Air New Zealand
flight
NZ 6421:
Cleveland - Houston George Bush
Cleveland - Houston George Bush
FLIGHT SCHEDULE
Direct Codeshare Flights:
Air New Zealand NZ6421
Valid until 2026-01-02
Mon
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Tue
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Wed
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Thu
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Fri
Sat
Sun
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Codeshare flight, operated by United Airlines.
(UA 1645)
Duration: 3:32, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Operates only on 2026-01-10
Mon
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Tue
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Wed
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Thu
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Fri
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Sat
Sun
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Codeshare flight, operated by United Airlines.
(UA 1645)
Duration: 3:30, non-stop Boeing 737-900 (739)
Direct Codeshare Flights:
Air New Zealand NZ6421
Operates only on 2026-01-19
Mon
Tue
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Wed
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Thu
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Fri
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Sat
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Sun
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Codeshare flight, operated by United Airlines.
(UA 1645)
Duration: 3:32, non-stop Airbus A319 (319)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-01-27 through 2026-02-03
Mon
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Tue
Wed
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Thu
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Fri
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Sat
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Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1645)
Duration: 3:30, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-01-28 through 2026-02-02
Mon
Tue
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-
Wed
Thu
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Fri
-
-
Sat
-
-
Sun
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-
Codeshare flight, operated by United Airlines.
(UA 1645)
Duration: 3:32, non-stop Airbus A319 (319)
Direct Codeshare Flights:
Air New Zealand NZ6421
Operates only on 2026-02-11
Mon
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Tue
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Wed
Thu
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Fri
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Sat
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Sun
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Codeshare flight, operated by United Airlines.
(UA 1645)
Duration: 3:32, non-stop Airbus A319 (319)
Direct Codeshare Flights:
Air New Zealand NZ6421
Operates only on 2026-02-28
Mon
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Tue
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Wed
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Thu
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Fri
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Sat
Sun
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-
Codeshare flight, operated by United Airlines.
(UA 1645)
Duration: 3:26, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Air New Zealand NZ6421
Operates only on 2026-03-01
Mon
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Tue
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Wed
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Thu
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Fri
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Sat
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-
Sun
Codeshare flight, operated by United Airlines.
(UA 1645)
Duration: 3:26, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-01-06 through 2026-01-12
Mon
Tue
Wed
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-
Thu
-
-
Fri
Sat
-
-
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:32, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-01-13 through 2026-01-20
Mon
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Tue
Wed
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Thu
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Fri
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Sat
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Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:32, non-stop Boeing 737-900 (739)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-01-16 through 2026-01-25
Mon
-
-
Tue
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Wed
-
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Thu
-
-
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:32, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-01-26 through 2026-02-01
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:32, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-02-06 through 2026-02-10
Mon
Tue
Wed
-
-
Thu
-
-
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:32, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-01-07 through 2026-01-22
Mon
-
-
Tue
-
-
Wed
Thu
Fri
-
-
Sat
-
-
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:32, non-stop Boeing 737-900 (739)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-01-29 through 2026-02-05
Mon
-
-
Tue
-
-
Wed
-
-
Thu
Fri
-
-
Sat
-
-
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:32, non-stop Boeing 737-900 (739)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-04-30 through 2026-05-10
Mon
-
-
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-05-11 through 2026-05-18
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-05-19 through 2026-05-27
Mon
Tue
Wed
Thu
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Fri
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Sat
-
-
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-05-28 through 2026-06-03
Mon
Tue
Wed
Thu
Fri
-
-
Sat
-
-
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-06-09 through 2026-06-11
Mon
-
-
Tue
Wed
Thu
Fri
-
-
Sat
-
-
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-06-18 through 2026-06-19
Mon
-
-
Tue
-
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Wed
-
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Thu
Fri
Sat
-
-
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-06-26 through 2026-06-29
Mon
Tue
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-
Wed
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Thu
-
-
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-07-05 through 2026-07-08
Mon
Tue
Wed
Thu
-
-
Fri
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-
Sat
-
-
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-07-13 through 2026-07-16
Mon
Tue
Wed
Thu
Fri
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-
Sat
-
-
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-07-21 through 2026-07-24
Mon
-
-
Tue
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-07-30 through 2026-08-07
Mon
-
-
Tue
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Wed
Thu
Fri
Sat
-
-
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-08-08 through 2026-08-15
Mon
-
-
Tue
-
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Wed
-
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Thu
-
-
Fri
Sat
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-08-16 through 2026-08-24
Mon
Tue
-
-
Wed
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Thu
-
-
Fri
-
-
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-08-25 through 2026-08-31
Mon
Tue
Wed
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Thu
-
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Fri
-
-
Sat
-
-
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-09-02 through 2026-09-05
Mon
-
-
Tue
-
-
Wed
Thu
Fri
Sat
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-09-10 through 2026-09-13
Mon
-
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Tue
-
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Wed
-
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective from 2026-09-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:05, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Valid until 2026-01-05
Mon
Tue
Wed
Thu
-
-
Fri
-
-
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:30, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-02-13 through 2026-02-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:24, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-02-21 through 2026-02-27
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:24, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-03-03 through 2026-03-04
Mon
-
-
Tue
Wed
Thu
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-
Fri
-
-
Sat
-
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Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:24, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-03-13 through 2026-03-18
Mon
-
-
Tue
-
-
Wed
Thu
-
-
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:23, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-03-21 through 2026-03-23
Mon
Tue
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Wed
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Thu
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Fri
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-
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:23, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Air New Zealand NZ6421
Operates only on 2026-03-05
Mon
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Tue
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Wed
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Thu
Fri
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Sat
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Sun
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Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:20, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-03-29 through 2026-04-04
Mon
Tue
Wed
-
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:16, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-04-07 through 2026-04-12
Mon
-
-
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:16, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-04-15 through 2026-04-24
Mon
Tue
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:16, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-04-25 through 2026-04-29
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 1545)
Duration: 3:16, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-05-21 through 2026-05-24
Mon
-
-
Tue
-
-
Wed
-
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-05-29 through 2026-06-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-06-08 through 2026-06-15
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-06-16 through 2026-06-24
Mon
Tue
Wed
Thu
-
-
Fri
-
-
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-06-25 through 2026-07-02
Mon
-
-
Tue
Wed
Thu
Fri
-
-
Sat
-
-
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-07-03 through 2026-07-11
Mon
-
-
Tue
-
-
Wed
-
-
Thu
Fri
Sat
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-07-12 through 2026-07-19
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-07-20 through 2026-07-27
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-07-28 through 2026-08-04
Mon
Tue
Wed
Thu
-
-
Fri
-
-
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-08-09 through 2026-08-13
Mon
Tue
Wed
Thu
Fri
-
-
Sat
-
-
Sun
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-08-18 through 2026-08-21
Mon
-
-
Tue
Wed
Thu
Fri
Sat
-
-
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-08-26 through 2026-09-01
Mon
-
-
Tue
Wed
Thu
Fri
Sat
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-09-06 through 2026-09-09
Mon
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
Direct Codeshare Flights:
Air New Zealand NZ6421
Effective 2026-09-14 through 2026-09-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 323)
Duration: 3:05, non-stop Boeing 737-700 (73G)
- NZ 6421 is a domestic flight departing from the Cleveland airport (CLE) and arriving at Houston George Bush airport (IAH).
- The flight distance is 1090 miles, or 1754 km.
- The timezone of the departure airport is UTC-5 , and the timezone of the arrival airport is UTC-6 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
- For direct flights, the flight time varies between 3:05 and 3:32.