Delta Air Lines
flight
DL 6991:
Multiple routes
FLIGHT SCHEDULE
Direct Codeshare Flights:
Delta Air Lines DL6991
Effective 2026-01-06 through 2026-01-27
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Codeshare flight, operated by WestJet.
(WS 1542)
Duration: 4:09, non-stop Boeing 737-700 (73W)
Direct Codeshare Flights:
Delta Air Lines DL6991
Operates only on 2026-01-07
Mon
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Tue
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Thu
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Sun
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Codeshare flight, operated by WestJet.
(WS 1542)
Duration: 4:09, non-stop Boeing 737-800 (73H)
Direct Codeshare Flights:
Delta Air Lines DL6991
Operates only on 2026-01-14
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 WestJet.
(WS 1542)
Duration: 4:09, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Delta Air Lines DL6991
Effective 2026-01-21 through 2026-01-28
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 WestJet.
(WS 1542)
Duration: 4:09, non-stop Boeing 737-800 (73H)
Direct Codeshare Flights:
Delta Air Lines DL6991
Effective 2026-04-26 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by WestJet.
(WS 1429)
Duration: 4:15, non-stop Boeing 737-800 (73H)
Direct Codeshare Flights:
Delta Air Lines DL6991
Effective 2026-03-16 through 2026-03-27
Mon
Tue
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Wed
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Thu
Fri
Sat
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Sun
Codeshare flight, operated by WestJet.
(WS 1429)
Duration: 4:24, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Delta Air Lines DL6991
Operates only on 2026-03-29
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 WestJet.
(WS 1429)
Duration: 4:24, non-stop Boeing 737-700 (73W)
Direct Codeshare Flights:
Delta Air Lines DL6991
Effective 2026-03-30 through 2026-04-13
Mon
Tue
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Wed
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Thu
Fri
Sat
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Sun
Codeshare flight, operated by WestJet.
(WS 1429)
Duration: 4:24, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Delta Air Lines DL6991
Effective 2026-04-16 through 2026-04-23
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 WestJet.
(WS 1429)
Duration: 4:24, non-stop Boeing 737-700 (73W)
Direct Codeshare Flights:
Delta Air Lines DL6991
Effective 2026-04-17 through 2026-04-24
Mon
Tue
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Wed
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Thu
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Fri
Sat
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Sun
Codeshare flight, operated by WestJet.
(WS 1429)
Duration: 4:24, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Delta Air Lines DL6991
Effective from 2026-10-26
Mon
Tue
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Wed
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Thu
Fri
Sat
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Sun
Codeshare flight, operated by WestJet.
(WS 1429)
Duration: 4:26, non-stop Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Delta Air Lines DL6991
Effective 2026-01-02 through 2026-01-04
Mon
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Tue
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Wed
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Thu
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Fri
Sat
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Sun
Codeshare flight, operated by WestJet.
(WS 3566)
Duration: 1:27, non-stop De Havilland DHC-8-400 Dash 8Q (DH4)
Direct Codeshare Flights:
Delta Air Lines DL6991
Operates only on 2026-01-25
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 WestJet.
(WS 3566)
Duration: 1:27, non-stop De Havilland DHC-8-400 Dash 8Q (DH4)
This flight number is listed as serving the following routes:
- Calgary (YYC) - Houston George Bush (IAH)
- Calgary (YYC) - Saskatoon (YXE)
- Nashville (BNA) - Calgary (YYC)