United Flight 2104 Deals & Information (2026/2027)

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United Flight 2104 Route Deals From $131

The cheapest prices found with in the last 7 days for return flights were $249 and $131 for one-way flights to Newark Liberty Intl. Airport for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Nov 21 - Wed, Dec 2
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$249 Roundtrip, found 5 days ago
$249
Roundtrip
found 5 days ago
Select United flight, departing Sat, Nov 21 from Logan Intl. to Newark Liberty Intl. Airport, returning Wed, Dec 2, priced at $249 found 5 days ago
Sun, Nov 8 - Wed, Nov 11
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$261 Roundtrip, found 3 days ago
$261
Roundtrip
found 3 days ago
Select United flight, departing Sun, Nov 8 from Logan Intl. to Newark Liberty Intl. Airport, returning Wed, Nov 11, priced at $261 found 3 days ago
Sat, Nov 21 - Wed, Dec 2
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$263 Roundtrip, found 5 days ago
$263
Roundtrip
found 5 days ago
Select United flight, departing Sat, Nov 21 from Logan Intl. to Newark Liberty Intl. Airport, returning Wed, Dec 2, priced at $263 found 5 days ago
Sat, Nov 21 - Wed, Dec 2
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$264 Roundtrip, found 5 days ago
$264
Roundtrip
found 5 days ago
Select United flight, departing Sat, Nov 21 from Logan Intl. to Newark Liberty Intl. Airport, returning Wed, Dec 2, priced at $264 found 5 days ago
Wed, Nov 25 - Tue, Dec 1
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$267 Roundtrip, found 5 days ago
$267
Roundtrip
found 5 days ago
Select United flight, departing Wed, Nov 25 from Logan Intl. to Newark Liberty Intl. Airport, returning Tue, Dec 1, priced at $267 found 5 days ago
Wed, Oct 21 - Sun, Oct 25
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$271 Roundtrip, found 3 days ago
$271
Roundtrip
found 3 days ago
Select United flight, departing Wed, Oct 21 from Logan Intl. to Newark Liberty Intl. Airport, returning Sun, Oct 25, priced at $271 found 3 days ago
Thu, Oct 22 - Sun, Oct 25
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$275 Roundtrip, found 3 days ago
$275
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 22 from Logan Intl. to Newark Liberty Intl. Airport, returning Sun, Oct 25, priced at $275 found 3 days ago
Wed, Dec 9 - Thu, Dec 10
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$277 Roundtrip, found 4 hours ago
$277
Roundtrip
found 4 hours ago
Select United flight, departing Wed, Dec 9 from Logan Intl. to Newark Liberty Intl. Airport, returning Thu, Dec 10, priced at $277 found 4 hours ago
Sat, Nov 21 - Wed, Dec 2
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$278 Roundtrip, found 5 days ago
$278
Roundtrip
found 5 days ago
Select United flight, departing Sat, Nov 21 from Logan Intl. to Newark Liberty Intl. Airport, returning Wed, Dec 2, priced at $278 found 5 days ago
Fri, Oct 9 - Sun, Oct 11
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$281 Roundtrip, found 2 hours ago
$281
Roundtrip
found 2 hours ago
Select United flight, departing Fri, Oct 9 from Logan Intl. to Newark Liberty Intl. Airport, returning Sun, Oct 11, priced at $281 found 2 hours ago

Frequently asked questions

What route does flight number UA2104 take?
Flight number UA2104 takes approximately 3 hours and 59 minutes to fly straight from National Airport to DEN. We all know there's magic in the destination, but the journey is always half the fun!
How often is UA2104 on time?
If you're traveling with United Airlines flight number UA2104 between Ronald Reagan Washington National Airport (DCA) and Denver, CO Airport (DEN-Denver Intl.), it's a good thing to know that 85% of these flights reach their destination on time. In the rare event of a delay, you can expect an average wait time of roughly 18 minutes. This service has a 3.5-star rating.
What terminal does UA2104 fly out of?
Flights between Ronald Reagan Washington National Airport (DCA) and DIA airport are served by flight number UA2104, and passengers booked on this route typically take off from Terminal B.
What kind of plane is on flight number UA2104?
The Airbus A319 is the plane that's mostly used for flight UA2104. More often than not, this flight departs from Washington, DC Airport (DCA-Ronald Reagan Washington National) and arrives at Denver Intl. Airport (DEN).
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 UA2104 flight with Travelocity, please visit our Customer Service Portal.