United Flight 4455 Deals & Information (2025/2026)

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United Flight 4455 Route Deals From $310

The cheapest prices found with in the last 7 days for return flights were $349 and $310 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Sep 20 - Mon, Oct 20
YOW
Macdonald-Cartier Intl.
IAD
Washington Dulles Intl.
$349 Roundtrip, found 4 days ago
$349
Roundtrip
found 4 days ago
Select United flight, departing Sat, Sep 20 from Macdonald-Cartier Intl. to Washington Dulles Intl., returning Mon, Oct 20, priced at $349 found 4 days ago
Sat, Sep 20 - Mon, Oct 20
YOW
Macdonald-Cartier Intl.
IAD
Washington Dulles Intl.
$358 Roundtrip, found 4 days ago
$358
Roundtrip
found 4 days ago
Select United flight, departing Sat, Sep 20 from Macdonald-Cartier Intl. to Washington Dulles Intl., returning Mon, Oct 20, priced at $358 found 4 days ago
Sat, Sep 20 - Mon, Oct 20
YOW
Macdonald-Cartier Intl.
IAD
Washington Dulles Intl.
$389 Roundtrip, found 4 days ago
$389
Roundtrip
found 4 days ago
Select United flight, departing Sat, Sep 20 from Macdonald-Cartier Intl. to Washington Dulles Intl., returning Mon, Oct 20, priced at $389 found 4 days ago
Sat, Sep 20 - Mon, Oct 20
YOW
Macdonald-Cartier Intl.
IAD
Washington Dulles Intl.
$399 Roundtrip, found 4 days ago
$399
Roundtrip
found 4 days ago
Select United flight, departing Sat, Sep 20 from Macdonald-Cartier Intl. to Washington Dulles Intl., returning Mon, Oct 20, priced at $399 found 4 days ago
Sat, Sep 20 - Mon, Oct 20
YOW
Macdonald-Cartier Intl.
IAD
Washington Dulles Intl.
$404 Roundtrip, found 4 days ago
$404
Roundtrip
found 4 days ago
Select United flight, departing Sat, Sep 20 from Macdonald-Cartier Intl. to Washington Dulles Intl., returning Mon, Oct 20, priced at $404 found 4 days ago

Frequently asked questions

What route does flight number UA4455 take?
UA4455 travels from Joe Foss Field to O'Hare Intl. Airport (ORD) and flies direct. This trip typically takes 1 hour and 44 minutes.
What kind of plane is on flight number UA4455?
Get ready to cruise aboard a Canadair (Bombardier) Regional Jet 550 if you're taking off on flight UA4455. Almost all flights from Joe Foss Field to O'Hare Intl. Airport (ORD) are operated using this aircraft model.
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 UA4455 flight with Travelocity, please visit our Customer Service Portal.