United Airlines flight UA 8400: Montreal-Trudeau - New York LaGuardia

Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Mon,Tue,Thu-Sun 20:00 Montreal-Trudeau (YUL) 21:33 New York LaGuardia (LGA) B
UA 8400 Non-stop Canadair CRJ 900 (CR9) 1:33 Valid until 2026-01-04
Codeshare flight, operated by Air Canada.(AC 8646)
Mon,Wed,Thu 20:00 Montreal-Trudeau (YUL) 21:33 New York LaGuardia (LGA) B
UA 8400 Non-stop Embraer EMB 175 (E75) 1:33 Effective 2026-01-05 through 2026-01-08
Codeshare flight, operated by Air Canada.(AC 8646)
Mon,Tue,Sat,Sun 20:00 Montreal-Trudeau (YUL) 21:33 New York LaGuardia (LGA) B
UA 8400 Non-stop Canadair CRJ 900 (CR9) 1:33 Effective 2026-01-11 through 2026-01-20
Codeshare flight, operated by Air Canada.(AC 8646)
Wed,Thu 20:00 Montreal-Trudeau (YUL) 21:33 New York LaGuardia (LGA) B
UA 8400 Non-stop Embraer EMB 175 (E75) 1:33 Effective 2026-01-14 through 2026-01-15
Codeshare flight, operated by Air Canada.(AC 8646)
Daily 20:00 Montreal-Trudeau (YUL) 21:33 New York LaGuardia (LGA) B
UA 8400 Non-stop Canadair CRJ 900 (CR9) 1:33 Effective 2026-01-21 through 2026-03-27
Codeshare flight, operated by Air Canada.(AC 8646)
Sat 20:00 Montreal-Trudeau (YUL) 21:32 New York LaGuardia (LGA) B
UA 8400 Non-stop Embraer EMB 175 (E75) 1:32 Operates only on 2026-03-28
Codeshare flight, operated by Air Canada.(AC 8646)
Mon,Wed-Sun 20:00 Montreal-Trudeau (YUL) 21:28 New York LaGuardia (LGA) B
UA 8400 Non-stop Embraer EMB 175 (E75) 1:28 Effective 2026-03-29 through 2026-04-06
Codeshare flight, operated by Air Canada.(AC 8646)
Tue 20:00 Montreal-Trudeau (YUL) 21:26 New York LaGuardia (LGA) B
UA 8400 Non-stop Embraer EMB 175 (E75) 1:26 Operates only on 2026-03-31
Codeshare flight, operated by Air Canada.(AC 8646)
Daily 20:00 Montreal-Trudeau (YUL) 21:28 New York LaGuardia (LGA) B
UA 8400 Non-stop Embraer EMB 175 (E75) 1:28 Effective 2026-04-07 through 2026-04-30
Codeshare flight, operated by Air Canada.(AC 8646)
Daily 20:00 Montreal-Trudeau (YUL) 21:26 New York LaGuardia (LGA) B
UA 8400 Non-stop Canadair CRJ 900 (CR9) 1:26 Effective 2026-05-01 through 2026-06-17
Codeshare flight, operated by Air Canada.(AC 8646)
Daily 20:00 Montreal-Trudeau (YUL) 21:25 New York LaGuardia (LGA) B
UA 8400 Non-stop Canadair CRJ 900 (CR9) 1:25 Effective 2026-06-18 through 2026-09-07
Codeshare flight, operated by Air Canada.(AC 8646)
Daily 20:00 Montreal-Trudeau (YUL) 21:32 New York LaGuardia (LGA) B
UA 8400 Non-stop Embraer EMB 175 (E75) 1:32 Effective from 2026-10-25
Codeshare flight, operated by Air Canada.(AC 8646)
Daily 20:45 Montreal-Trudeau (YUL) 22:12 New York LaGuardia (LGA) B
UA 8400 Non-stop Embraer EMB 175 (E75) 1:27 Effective 2026-09-08 through 2026-10-24
Codeshare flight, operated by Air Canada.(AC 8646)


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United Airlines flight UA 8400:
Montreal-Trudeau - New York LaGuardia
Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
United Airlines UA8400
20:00
Montreal-Trudeau (YUL)

21:33
New York LaGuardia (LGA) B
Valid until 2026-01-04
Mon
Tue
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by Air Canada. (AC 8646)
Duration: 1:33, non-stop
Canadair CRJ 900 (CR9)
Direct Codeshare Flights:
United Airlines UA8400
20:00
Montreal-Trudeau (YUL)

21:33
New York LaGuardia (LGA) B
Effective 2026-01-05 through 2026-01-08
Mon
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Air Canada. (AC 8646)
Duration: 1:33, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
United Airlines UA8400
20:00
Montreal-Trudeau (YUL)

21:33
New York LaGuardia (LGA) B
Effective 2026-01-11 through 2026-01-20
Mon
Tue
Wed
-
Thu
-
Fri
-
Sat
Sun
Codeshare flight, operated by Air Canada. (AC 8646)
Duration: 1:33, non-stop
Canadair CRJ 900 (CR9)
Direct Codeshare Flights:
United Airlines UA8400
20:00
Montreal-Trudeau (YUL)

21:33
New York LaGuardia (LGA) B
Effective 2026-01-14 through 2026-01-15
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Air Canada. (AC 8646)
Duration: 1:33, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
United Airlines UA8400
20:00
Montreal-Trudeau (YUL)

21:33
New York LaGuardia (LGA) B
Effective 2026-01-21 through 2026-03-27
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Air Canada. (AC 8646)
Duration: 1:33, non-stop
Canadair CRJ 900 (CR9)
Direct Codeshare Flights:
United Airlines UA8400
20:00
Montreal-Trudeau (YUL)

21:32
New York LaGuardia (LGA) B
Operates only on 2026-03-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Air Canada. (AC 8646)
Duration: 1:32, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
United Airlines UA8400
20:00
Montreal-Trudeau (YUL)

21:28
New York LaGuardia (LGA) B
Effective 2026-03-29 through 2026-04-06
Mon
Tue
-
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Air Canada. (AC 8646)
Duration: 1:28, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
United Airlines UA8400
20:00
Montreal-Trudeau (YUL)

21:26
New York LaGuardia (LGA) B
Operates only on 2026-03-31
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Air Canada. (AC 8646)
Duration: 1:26, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
United Airlines UA8400
20:00
Montreal-Trudeau (YUL)

21:28
New York LaGuardia (LGA) B
Effective 2026-04-07 through 2026-04-30
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Air Canada. (AC 8646)
Duration: 1:28, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
United Airlines UA8400
20:00
Montreal-Trudeau (YUL)

21:26
New York LaGuardia (LGA) B
Effective 2026-05-01 through 2026-06-17
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Air Canada. (AC 8646)
Duration: 1:26, non-stop
Canadair CRJ 900 (CR9)
Direct Codeshare Flights:
United Airlines UA8400
20:00
Montreal-Trudeau (YUL)

21:25
New York LaGuardia (LGA) B
Effective 2026-06-18 through 2026-09-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Air Canada. (AC 8646)
Duration: 1:25, non-stop
Canadair CRJ 900 (CR9)
Direct Codeshare Flights:
United Airlines UA8400
20:00
Montreal-Trudeau (YUL)

21:32
New York LaGuardia (LGA) B
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Air Canada. (AC 8646)
Duration: 1:32, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
United Airlines UA8400
20:45
Montreal-Trudeau (YUL)

22:12
New York LaGuardia (LGA) B
Effective 2026-09-08 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Air Canada. (AC 8646)
Duration: 1:27, non-stop
Embraer EMB 175 (E75)
  • UA 8400 is an international flight departing from Montreal-Trudeau airport, Canada (YUL) and arriving at New York LaGuardia airport, United States (LGA).
  • The flight distance is 324 miles, or 521 km.
  • The timezone of both the departure and the arrival airports is UTC-5 . Current time at both airports is (loading...).
  • For direct flights, the flight time varies between 1:25 and 1:33.
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