United Flight 2104 Deals & Information (2026/2027)

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United Flight 2104 Route Deals From $112

The cheapest prices found with in the last 7 days for return flights were $217 and $112 for one-way flights to Newark Liberty Intl. Airport for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Sep 21 - Tue, Sep 22
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$217 Roundtrip, found 1 day ago
$217
Roundtrip
found 1 day ago
Select United flight, departing Mon, Sep 21 from Logan Intl. to Newark Liberty Intl. Airport, returning Tue, Sep 22, priced at $217 found 1 day ago
Thu, Oct 22 - Sun, Oct 25
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$219 Roundtrip, found 12 hours ago
$219
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Oct 22 from Logan Intl. to Newark Liberty Intl. Airport, returning Sun, Oct 25, priced at $219 found 12 hours ago
Sat, Oct 3 - Tue, Oct 6
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$220 Roundtrip, found 1 day ago
$220
Roundtrip
found 1 day ago
Select United flight, departing Sat, Oct 3 from Logan Intl. to Newark Liberty Intl. Airport, returning Tue, Oct 6, priced at $220 found 1 day ago
Thu, Oct 22 - Sun, Oct 25
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$222 Roundtrip, found 12 hours ago
$222
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Oct 22 from Logan Intl. to Newark Liberty Intl. Airport, returning Sun, Oct 25, priced at $222 found 12 hours ago
Mon, Sep 7 - Tue, Sep 8
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$225 Roundtrip, found 1 day ago
$225
Roundtrip
found 1 day ago
Select United flight, departing Mon, Sep 7 from Logan Intl. to Newark Liberty Intl. Airport, returning Tue, Sep 8, priced at $225 found 1 day ago
Thu, Oct 29 - Fri, Oct 30
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$234 Roundtrip, found 16 hours ago
$234
Roundtrip
found 16 hours ago
Select United flight, departing Thu, Oct 29 from Logan Intl. to Newark Liberty Intl. Airport, returning Fri, Oct 30, priced at $234 found 16 hours ago
Sat, Oct 3 - Tue, Oct 6
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$236 Roundtrip, found 1 day ago
$236
Roundtrip
found 1 day ago
Select United flight, departing Sat, Oct 3 from Logan Intl. to Newark Liberty Intl. Airport, returning Tue, Oct 6, priced at $236 found 1 day ago
Sun, Sep 6 - Mon, Sep 7
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$237 Roundtrip, found 2 days ago
$237
Roundtrip
found 2 days ago
Select United flight, departing Sun, Sep 6 from Logan Intl. to Newark Liberty Intl. Airport, returning Mon, Sep 7, priced at $237 found 2 days ago
Sat, Oct 3 - Tue, Oct 6
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$241 Roundtrip, found 1 day ago
$241
Roundtrip
found 1 day ago
Select United flight, departing Sat, Oct 3 from Logan Intl. to Newark Liberty Intl. Airport, returning Tue, Oct 6, priced at $241 found 1 day ago
Thu, Sep 17 - Sat, Sep 19
BOS
Logan Intl.
EWR
Newark Liberty Intl. Airport
$242 Roundtrip, found 4 days ago
$242
Roundtrip
found 4 days ago
Select United flight, departing Thu, Sep 17 from Logan Intl. to Newark Liberty Intl. Airport, returning Sat, Sep 19, priced at $242 found 4 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.