United Airlines flight UA 9721: Boston Logan - Zurich

Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 21:40 Boston Logan (BOS) E 10:55 Zurich (ZRH)
UA 9721 Non-stop Airbus A330-300 (333) 7:15 Effective 2026-03-29 through 2026-10-23
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Tue-Thu 21:50 Boston Logan (BOS) E 11:10 Zurich (ZRH)
UA 9721 Non-stop Airbus A330-300 (333) 7:20 Effective 2026-01-20 through 2026-02-04
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Tue-Thu 21:50 Boston Logan (BOS) E 11:10 Zurich (ZRH)
UA 9721 Non-stop Airbus A330-300 (333) 7:20 Effective 2026-02-10 through 2026-02-18
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Tue,Wed 21:50 Boston Logan (BOS) E 11:10 Zurich (ZRH)
UA 9721 Non-stop Airbus A330-300 (333) 7:20 Effective 2026-02-24 through 2026-03-04
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Thu 21:50 Boston Logan (BOS) E 11:10 Zurich (ZRH)
UA 9721 Non-stop Airbus A330-300 (333) 7:20 Operates only on 2026-03-05
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Mon,Thu-Sun 22:10 Boston Logan (BOS) E 11:10 Zurich (ZRH)
UA 9721 Non-stop Airbus A350-900 (359) 7:00 Valid until 2026-01-05
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Daily 22:10 Boston Logan (BOS) E 11:10 Zurich (ZRH)
UA 9721 Non-stop Airbus A350-900 (359) 7:00 Effective 2026-01-06 through 2026-01-19
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Mon,Fri-Sun 22:10 Boston Logan (BOS) E 11:10 Zurich (ZRH)
UA 9721 Non-stop Airbus A350-900 (359) 7:00 Effective 2026-01-23 through 2026-02-02
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Mon,Thu-Sun 22:10 Boston Logan (BOS) E 11:10 Zurich (ZRH)
UA 9721 Non-stop Airbus A350-900 (359) 7:00 Effective 2026-02-05 through 2026-02-09
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Mon,Thu-Sun 22:10 Boston Logan (BOS) E 11:10 Zurich (ZRH)
UA 9721 Non-stop Airbus A350-900 (359) 7:00 Effective 2026-02-13 through 2026-03-02
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Fri,Sat 22:10 Boston Logan (BOS) E 11:10 Zurich (ZRH)
UA 9721 Non-stop Airbus A350-900 (359) 7:00 Effective 2026-03-06 through 2026-03-07
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Sat 22:15 Boston Logan (BOS) E 11:30 Zurich (ZRH)
UA 9721 Non-stop Airbus A330-300 (333) 7:15 Operates only on 2026-03-28
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Tue-Thu 22:50 Boston Logan (BOS) E 11:10 Zurich (ZRH)
UA 9721 Non-stop Airbus A330-300 (333) 7:20 Effective 2026-03-10 through 2026-03-26
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Daily 22:50 Boston Logan (BOS) E 11:10 Zurich (ZRH)
UA 9721 Non-stop Airbus A330-300 (333) 7:20 Effective from 2026-10-24
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.
Mon,Fri-Sun 23:10 Boston Logan (BOS) E 11:10 Zurich (ZRH)
UA 9721 Non-stop Airbus A350-900 (359) 7:00 Effective 2026-03-08 through 2026-03-27
Codeshare flight, operated by Swiss.(LX 53)
The flight arrives 1 day after departure.


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United Airlines flight UA 9721:
Boston Logan - Zurich
Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
United Airlines UA9721
21:40
Boston Logan (BOS) E

10:55(+1)
Zurich (ZRH)
Effective 2026-03-29 through 2026-10-23
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:15, non-stop
Airbus A330-300 (333)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
21:50
Boston Logan (BOS) E

11:10(+1)
Zurich (ZRH)
Effective 2026-01-20 through 2026-02-04
Mon
-
Tue
Wed
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:20, non-stop
Airbus A330-300 (333)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
21:50
Boston Logan (BOS) E

11:10(+1)
Zurich (ZRH)
Effective 2026-02-10 through 2026-02-18
Mon
-
Tue
Wed
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:20, non-stop
Airbus A330-300 (333)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
21:50
Boston Logan (BOS) E

11:10(+1)
Zurich (ZRH)
Effective 2026-02-24 through 2026-03-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:20, non-stop
Airbus A330-300 (333)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
21:50
Boston Logan (BOS) E

11:10(+1)
Zurich (ZRH)
Operates only on 2026-03-05
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:20, non-stop
Airbus A330-300 (333)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
22:10
Boston Logan (BOS) E

11:10(+1)
Zurich (ZRH)
Valid until 2026-01-05
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:00, non-stop
Airbus A350-900 (359)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
22:10
Boston Logan (BOS) E

11:10(+1)
Zurich (ZRH)
Effective 2026-01-06 through 2026-01-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:00, non-stop
Airbus A350-900 (359)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
22:10
Boston Logan (BOS) E

11:10(+1)
Zurich (ZRH)
Effective 2026-01-23 through 2026-02-02
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:00, non-stop
Airbus A350-900 (359)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
22:10
Boston Logan (BOS) E

11:10(+1)
Zurich (ZRH)
Effective 2026-02-05 through 2026-02-09
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:00, non-stop
Airbus A350-900 (359)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
22:10
Boston Logan (BOS) E

11:10(+1)
Zurich (ZRH)
Effective 2026-02-13 through 2026-03-02
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:00, non-stop
Airbus A350-900 (359)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
22:10
Boston Logan (BOS) E

11:10(+1)
Zurich (ZRH)
Effective 2026-03-06 through 2026-03-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:00, non-stop
Airbus A350-900 (359)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
22:15
Boston Logan (BOS) E

11:30(+1)
Zurich (ZRH)
Operates only on 2026-03-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:15, non-stop
Airbus A330-300 (333)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
22:50
Boston Logan (BOS) E

11:10(+1)
Zurich (ZRH)
Effective 2026-03-10 through 2026-03-26
Mon
-
Tue
Wed
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:20, non-stop
Airbus A330-300 (333)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
22:50
Boston Logan (BOS) E

11:10(+1)
Zurich (ZRH)
Effective from 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:20, non-stop
Airbus A330-300 (333)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
United Airlines UA9721
23:10
Boston Logan (BOS) E

11:10(+1)
Zurich (ZRH)
Effective 2026-03-08 through 2026-03-27
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
Codeshare flight, operated by Swiss. (LX 53)
Duration: 7:00, non-stop
Airbus A350-900 (359)
The flight arrives 1 day after departure.
  • UA 9721 is an international flight departing from Boston Logan airport, United States (BOS) and arriving at Zurich airport, Switzerland (ZRH).
  • The flight distance is 3732 miles, or 6006 km.
  • The timezone of the departure airport is UTC-5 , and the timezone of the arrival airport is UTC+1 . 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 7:00 and 7:20.
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