United Flight 2104 Deals & Information (2026/2027)

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United Flight 2104 Route Deals From $110

The cheapest prices found with in the last 7 days for return flights were $215 and $110 for one-way flights to Newark Liberty Intl. Airport for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 8 - Wed, Sep 9
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$215 Roundtrip, found 5 days ago
$215
Roundtrip
found 5 days ago
Select United flight, departing Tue, Sep 8 from Logan Intl. to Newark Liberty Intl. Airport, returning Wed, Sep 9, priced at $215 found 5 days ago
Wed, Sep 23 - Wed, Sep 30
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$217 Roundtrip, found 8 hours ago
$217
Roundtrip
found 8 hours ago
Select United flight, departing Wed, Sep 23 from Logan Intl. to Newark Liberty Intl. Airport, returning Wed, Sep 30, priced at $217 found 8 hours ago
Mon, Sep 14 - Sun, Sep 20
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$219 Roundtrip, found 4 hours ago
$219
Roundtrip
found 4 hours ago
Select United flight, departing Mon, Sep 14 from Logan Intl. to Newark Liberty Intl. Airport, returning Sun, Sep 20, priced at $219 found 4 hours ago
Wed, Sep 23 - Wed, Sep 30
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$220 Roundtrip, found 8 hours ago
$220
Roundtrip
found 8 hours ago
Select United flight, departing Wed, Sep 23 from Logan Intl. to Newark Liberty Intl. Airport, returning Wed, Sep 30, priced at $220 found 8 hours ago
Thu, Nov 26 - Fri, Nov 27
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$221 Roundtrip, found 5 hours ago
$221
Roundtrip
found 5 hours ago
Select United flight, departing Thu, Nov 26 from Logan Intl. to Newark Liberty Intl. Airport, returning Fri, Nov 27, priced at $221 found 5 hours ago
Wed, Sep 2 - Thu, Sep 3
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$222 Roundtrip, found 4 days ago
$222
Roundtrip
found 4 days ago
Select United flight, departing Wed, Sep 2 from Logan Intl. to Newark Liberty Intl. Airport, returning Thu, Sep 3, priced at $222 found 4 days ago
Sat, Sep 5 - Tue, Sep 8
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$225 Roundtrip, found 3 days ago
$225
Roundtrip
found 3 days ago
Select United flight, departing Sat, Sep 5 from Logan Intl. to Newark Liberty Intl. Airport, returning Tue, Sep 8, priced at $225 found 3 days ago
Fri, Sep 4 - Fri, Sep 11
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$229 Roundtrip, found 2 days ago
$229
Roundtrip
found 2 days ago
Select United flight, departing Fri, Sep 4 from Logan Intl. to Newark Liberty Intl. Airport, returning Fri, Sep 11, priced at $229 found 2 days ago
Sun, Sep 6 - Tue, Sep 8
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$231 Roundtrip, found 5 days ago
$231
Roundtrip
found 5 days ago
Select United flight, departing Sun, Sep 6 from Logan Intl. to Newark Liberty Intl. Airport, returning Tue, Sep 8, priced at $231 found 5 days ago
Fri, Sep 4 - Fri, Sep 11
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$232 Roundtrip, found 2 days ago
$232
Roundtrip
found 2 days ago
Select United flight, departing Fri, Sep 4 from Logan Intl. to Newark Liberty Intl. Airport, returning Fri, Sep 11, priced at $232 found 2 days 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.