United Flight 3873 Deals & Information (2026/2027)

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United Flight 3873 Route Deals From $821

The cheapest prices found with in the last 7 days for return flights were and $821 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

What route does flight number UA3873 take?
UA3873 is used on multiple routes, but the most common is between Bangor Intl. Airport (BGR) and IAD. If on a non-stop flight, you'll land in around 2 hours and 5 minutes. Multi-stop flights can also use this number, as can services on other routes.
What kind of plane is on flight number UA3873?
It's likely you'll be traveling aboard the Bombardier CRJ if you've booked a seat on flight UA3873 from Bangor International Airport to Washington, DC Airport (IAD-Washington Dulles Intl.). This is the most commonly used aircraft model on this particular 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 UA3873 flight with Travelocity, please visit our Customer Service Portal.