United Flight AC3651 Deals & Information (2025/2026)

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United Flight 3651 Route Deals From $137

The cheapest prices found with in the last 7 days for return flights were $269 and $137 for one-way flights to Pierre Elliott Trudeau Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 19 - Wed, Aug 20
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$269 Roundtrip, found 4 days ago
$269
Roundtrip
found 4 days ago
Select United flight, departing Tue, Aug 19 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Wed, Aug 20, priced at $269 found 4 days ago
Tue, Aug 19 - Wed, Aug 20
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$289 Roundtrip, found 4 days ago
$289
Roundtrip
found 4 days ago
Select United flight, departing Tue, Aug 19 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Wed, Aug 20, priced at $289 found 4 days ago
Mon, Jul 14 - Sat, Jul 19
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$304 Roundtrip, found 1 hour ago
$304
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Jul 14 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Sat, Jul 19, priced at $304 found 1 hour ago
Tue, Aug 19 - Wed, Aug 20
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$306 Roundtrip, found 4 days ago
$306
Roundtrip
found 4 days ago
Select United flight, departing Tue, Aug 19 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Wed, Aug 20, priced at $306 found 4 days ago
Sat, Jul 19 - Thu, Jul 24
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$314 Roundtrip, found 1 day ago
$314
Roundtrip
found 1 day ago
Select United flight, departing Sat, Jul 19 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Thu, Jul 24, priced at $314 found 1 day ago
Sun, Sep 7 - Fri, Sep 12
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$326 Roundtrip, found 1 day ago
$326
Roundtrip
found 1 day ago
Select United flight, departing Sun, Sep 7 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Fri, Sep 12, priced at $326 found 1 day ago
Mon, Jul 14 - Sat, Jul 19
IAD
Washington Dulles Intl.
YUL
Pierre Elliott Trudeau Intl.
$332 Roundtrip, found 1 hour ago
$332
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Jul 14 from Washington Dulles Intl. to Pierre Elliott Trudeau Intl., returning Sat, Jul 19, priced at $332 found 1 hour ago

Frequently asked questions

What route does flight number UA3651 take?
Flight number UA3651 operates straight from Pittsburgh Intl. Airport (PIT) to ORD. During this trip, you can expect to be in the air for around 1 hour and 35 minutes. It pays to book ahead to secure your favorite seat.
What kind of plane is on flight number UA3651?
Get set to climb aboard an Embraer 170 if you have a seat on flight UA3651. The majority of flights from PIT to O'Hare Airport operate using this type of plane.
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 UA3651 flight with Travelocity, please visit our Customer Service Portal.