United Flight 2104 Deals & Information (2026/2027)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

United Flight 2104 Route Deals From $85

The cheapest prices found with in the last 7 days for return flights were $167 and $85 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, May 26 - Tue, Jun 2
ORD
O'Hare Intl.
BOS
Logan Intl.
$167 Roundtrip, found 6 hours ago
$167
Roundtrip
found 6 hours ago
Select United flight, departing Tue, May 26 from O'Hare Intl. to Logan Intl., returning Tue, Jun 2, priced at $167 found 6 hours ago
Tue, May 26 - Tue, Jun 2
ORD
O'Hare Intl.
BOS
Logan Intl.
$177 Roundtrip, found 6 hours ago
$177
Roundtrip
found 6 hours ago
Select United flight, departing Tue, May 26 from O'Hare Intl. to Logan Intl., returning Tue, Jun 2, priced at $177 found 6 hours ago
Wed, Aug 19 - Sat, Aug 22
ORD
O'Hare Intl.
BOS
Logan Intl.
$182 Roundtrip, found 3 hours ago
$182
Roundtrip
found 3 hours ago
Select United flight, departing Wed, Aug 19 from O'Hare Intl. to Logan Intl., returning Sat, Aug 22, priced at $182 found 3 hours ago
Wed, May 6 - Thu, May 7
ORD
O'Hare Intl.
BOS
Logan Intl.
$186 Roundtrip, found 12 hours ago
$186
Roundtrip
found 12 hours ago
Select United flight, departing Wed, May 6 from O'Hare Intl. to Logan Intl., returning Thu, May 7, priced at $186 found 12 hours ago
Thu, Jul 9 - Mon, Jul 13
ORD
O'Hare Intl.
BOS
Logan Intl.
$187 Roundtrip, found 1 hour ago
$187
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Jul 9 from O'Hare Intl. to Logan Intl., returning Mon, Jul 13, priced at $187 found 1 hour ago
Tue, Aug 25 - Tue, Sep 1
ORD
O'Hare Intl.
BOS
Logan Intl.
$192 Roundtrip, found 1 day ago
$192
Roundtrip
found 1 day ago
Select United flight, departing Tue, Aug 25 from O'Hare Intl. to Logan Intl., returning Tue, Sep 1, priced at $192 found 1 day ago
Wed, Jun 3 - Tue, Jun 9
ORD
O'Hare Intl.
BOS
Logan Intl.
$193 Roundtrip, found 11 hours ago
$193
Roundtrip
found 11 hours ago
Select United flight, departing Wed, Jun 3 from O'Hare Intl. to Logan Intl., returning Tue, Jun 9, priced at $193 found 11 hours ago
Wed, May 13 - Sun, May 17
ORD
O'Hare Intl.
BOS
Logan Intl.
$196 Roundtrip, just found
$196
Roundtrip
just found
Select United flight, departing Wed, May 13 from O'Hare Intl. to Logan Intl., returning Sun, May 17, priced at $196 just found
Wed, May 13 - Sun, May 17
ORD
O'Hare Intl.
BOS
Logan Intl.
$198 Roundtrip, just found
$198
Roundtrip
just found
Select United flight, departing Wed, May 13 from O'Hare Intl. to Logan Intl., returning Sun, May 17, priced at $198 just found

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.