United Flight 251 Deals & Information (2025/2026)

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United Flight 251 Route Deals From $92

The cheapest prices found with in the last 7 days for return flights were $184 and $92 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Jul 2 - Mon, Jul 7
BDL
Bradley Intl.
IAD
Washington Dulles Intl.
$184 Roundtrip, found 12 hours ago
$184
Roundtrip
found 12 hours ago
Select United flight, departing Wed, Jul 2 from Bradley Intl. to Washington Dulles Intl., returning Mon, Jul 7, priced at $184 found 12 hours ago
Sat, May 31 - Wed, Aug 20
BDL
Bradley Intl.
IAD
Washington Dulles Intl.
$188 Roundtrip, found 3 days ago
$188
Roundtrip
found 3 days ago
Select United flight, departing Sat, May 31 from Bradley Intl. to Washington Dulles Intl., returning Wed, Aug 20, priced at $188 found 3 days ago
Fri, May 23 - Tue, May 27
BDL
Bradley Intl.
IAD
Washington Dulles Intl.
$189 Roundtrip, found 11 hours ago
$189
Roundtrip
found 11 hours ago
Select United flight, departing Fri, May 23 from Bradley Intl. to Washington Dulles Intl., returning Tue, May 27, priced at $189 found 11 hours ago
Fri, Jun 20 - Sun, Jun 22
BDL
Bradley Intl.
IAD
Washington Dulles Intl.
$192 Roundtrip, found 4 days ago
$192
Roundtrip
found 4 days ago
Select United flight, departing Fri, Jun 20 from Bradley Intl. to Washington Dulles Intl., returning Sun, Jun 22, priced at $192 found 4 days ago
Sat, May 31 - Wed, Aug 20
BDL
Bradley Intl.
IAD
Washington Dulles Intl.
$197 Roundtrip, found 3 days ago
$197
Roundtrip
found 3 days ago
Select United flight, departing Sat, May 31 from Bradley Intl. to Washington Dulles Intl., returning Wed, Aug 20, priced at $197 found 3 days ago
Fri, Jun 13 - Sun, Jun 15
BDL
Bradley Intl.
IAD
Washington Dulles Intl.
$198 Roundtrip, found 2 days ago
$198
Roundtrip
found 2 days ago
Select United flight, departing Fri, Jun 13 from Bradley Intl. to Washington Dulles Intl., returning Sun, Jun 15, priced at $198 found 2 days ago
Sat, May 10 - Sun, May 11
BDL
Bradley Intl.
IAD
Washington Dulles Intl.
$201 Roundtrip, found 2 days ago
$201
Roundtrip
found 2 days ago
Select United flight, departing Sat, May 10 from Bradley Intl. to Washington Dulles Intl., returning Sun, May 11, priced at $201 found 2 days ago
Wed, Jul 2 - Mon, Jul 7
BDL
Bradley Intl.
IAD
Washington Dulles Intl.
$206 Roundtrip, found 12 hours ago
$206
Roundtrip
found 12 hours ago
Select United flight, departing Wed, Jul 2 from Bradley Intl. to Washington Dulles Intl., returning Mon, Jul 7, priced at $206 found 12 hours ago
Thu, May 29 - Sun, Jun 1
BDL
Bradley Intl.
IAD
Washington Dulles Intl.
$207 Roundtrip, found 5 days ago
$207
Roundtrip
found 5 days ago
Select United flight, departing Thu, May 29 from Bradley Intl. to Washington Dulles Intl., returning Sun, Jun 1, priced at $207 found 5 days ago
Tue, May 20 - Mon, May 26
BDL
Bradley Intl.
IAD
Washington Dulles Intl.
$211 Roundtrip, found 18 hours ago
$211
Roundtrip
found 18 hours ago
Select United flight, departing Tue, May 20 from Bradley Intl. to Washington Dulles Intl., returning Mon, May 26, priced at $211 found 18 hours ago

Frequently asked questions

What route does flight number UA251 take?
UA251 operates between Logan Intl. Airport and EWR directly. This service takes 1 hour and 20 minutes.
What terminal does UA251 fly out of?
Flights between Logan Intl. Airport (BOS) and Newark, NJ Airport (EWR-Liberty Intl.) are served by flight number UA251, and travelers with a seat booked on this route usually take off from Terminal B.
What kind of plane is on flight number UA251?
The Boeing 737-800 is the type of aircraft predominantly used for flight number UA251. This flight almost always jets off from Logan Intl. Airport (BOS) and lands at Newark Airport.
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 UA251 flight with Travelocity, please visit our Customer Service Portal.