United Flight 3921 Deals & Information (2025/2026)

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Frequently asked questions

What route does flight number UA3921 take?
UA3921 serves multiple routes, but the most common is between Washington, DC Airport (IAD-Washington Dulles Intl.) and BGR. If you're lucky enough to score a direct flight, you'll stroll through arrivals in 1 hour and 56 minutes. Multi-stop flights can also use this number, as can services on other routes.
What kind of plane is on flight number UA3921?
You're likely to travel aboard a Bombardier CRJ if you've reserved a ticket on flight UA3921 from Washington, DC Airport (IAD-Washington Dulles Intl.) to Bangor, ME Airport (BGR-Bangor Intl.). This is the most commonly used aircraft on this busy route.
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 UA3921 flight with Travelocity, please visit our Customer Service Portal.