United Flight 3645 Deals & Information (2024/2025)

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United Flight 3645 Route Deals From $154

The cheapest prices found with in the last 7 days for return flights were $296 and $154 for one-way flights to Pierre Elliott Trudeau Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, May 15 - Sat, May 18
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$296 Roundtrip, found 10 hours ago
$296
Roundtrip
found 10 hours ago
Select United flight, departing Wed, May 15 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Sat, May 18, priced at $296 found 10 hours ago
Wed, May 15 - Sat, May 18
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$305 Roundtrip, found 10 hours ago
$305
Roundtrip
found 10 hours ago
Select United flight, departing Wed, May 15 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Sat, May 18, priced at $305 found 10 hours ago
Wed, May 22 - Sat, May 25
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$322 Roundtrip, found 10 hours ago
$322
Roundtrip
found 10 hours ago
Select United flight, departing Wed, May 22 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Sat, May 25, priced at $322 found 10 hours ago
Wed, May 15 - Sat, May 18
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$323 Roundtrip, found 10 hours ago
$323
Roundtrip
found 10 hours ago
Select United flight, departing Wed, May 15 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Sat, May 18, priced at $323 found 10 hours ago
Wed, May 15 - Sat, May 18
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$323 Roundtrip, found 10 hours ago
$323
Roundtrip
found 10 hours ago
Select United flight, departing Wed, May 15 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Sat, May 18, priced at $323 found 10 hours ago
Wed, May 15 - Sat, May 18
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$332 Roundtrip, found 10 hours ago
$332
Roundtrip
found 10 hours ago
Select United flight, departing Wed, May 15 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Sat, May 18, priced at $332 found 10 hours ago
Wed, Jun 12 - Wed, Jun 19
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$341 Roundtrip, found 9 hours ago
$341
Roundtrip
found 9 hours ago
Select United flight, departing Wed, Jun 12 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Wed, Jun 19, priced at $341 found 9 hours ago
Wed, May 15 - Sat, May 18
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$342 Roundtrip, found 10 hours ago
$342
Roundtrip
found 10 hours ago
Select United flight, departing Wed, May 15 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Sat, May 18, priced at $342 found 10 hours ago
Wed, May 15 - Sat, May 18
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$348 Roundtrip, found 10 hours ago
$348
Roundtrip
found 10 hours ago
Select United flight, departing Wed, May 15 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Sat, May 18, priced at $348 found 10 hours ago
Wed, Jun 12 - Wed, Jun 19
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$351 Roundtrip, found 9 hours ago
$351
Roundtrip
found 9 hours ago
Select United flight, departing Wed, Jun 12 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Wed, Jun 19, priced at $351 found 9 hours ago
Wed, May 22 - Sat, May 25
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$354 Roundtrip, found 10 hours ago
$354
Roundtrip
found 10 hours ago
Select United flight, departing Wed, May 22 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Sat, May 25, priced at $354 found 10 hours ago
Wed, Jun 12 - Wed, Jun 19
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$356 Roundtrip, found 9 hours ago
$356
Roundtrip
found 9 hours ago
Select United flight, departing Wed, Jun 12 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Wed, Jun 19, priced at $356 found 9 hours ago

More United Flight For This Route

CarrierFlightDepart IADArrive YULFri
4/19		Sat
4/20		Sun
4/21		Mon
4/22		Tue
4/23		Wed
4/24		Thu
4/25		Stops
UA364508:16 am10:11 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
UA360205:26 pm07:27 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops

Frequently asked questions

What route does flight number UA3645 take?
UA3645 is used on a range of routes. Most commonly, UA3645 flies directly from O’Hare Intl. Airport (ORD) to Missoula Intl. Airport. If you have a ticket on this route, you’ll be airborne for 3 hours and 49 minutes.
What terminal does UA3645 fly out of?
UA3645 flights from O’Hare Intl. Airport (ORD) normally depart from Terminal 2. This flight number runs on several routes, but the most traveled one is O’Hare Intl. Airport (ORD) to Missoula, MT Airport (MSO-Missoula Intl.).
What kind of plane is on flight number UA3645?
If you’re taking flight UA3645 from Chicago, IL Airport (ORD-O’Hare Intl.) to Missoula Intl. Airport (MSO), there’s a strong chance you’ll be setting off on the Embraer 170. Flight UA3645 serves several routes, but this is the most common one.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your UA3645 flight with Travelocity, please visit our Customer Service Portal.