United Flight 2104 Deals & Information (2025/2026)

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United Flight 2104 Route Deals From $65

The cheapest prices found with in the last 7 days for return flights were $127 and $65 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Nov 6 - Mon, Nov 10
ORD
O'Hare Intl.
BOS
Logan Intl.
$127 Roundtrip, just found
$127
Roundtrip
just found
Select United flight, departing Thu, Nov 6 from O'Hare Intl. to Logan Intl., returning Mon, Nov 10, priced at $127 just found
Thu, Nov 6 - Mon, Nov 10
ORD
O'Hare Intl.
BOS
Logan Intl.
$129 Roundtrip, just found
$129
Roundtrip
just found
Select United flight, departing Thu, Nov 6 from O'Hare Intl. to Logan Intl., returning Mon, Nov 10, priced at $129 just found
Thu, Nov 13 - Sun, Nov 16
ORD
O'Hare Intl.
BOS
Logan Intl.
$132 Roundtrip, just found
$132
Roundtrip
just found
Select United flight, departing Thu, Nov 13 from O'Hare Intl. to Logan Intl., returning Sun, Nov 16, priced at $132 just found
Thu, Oct 30 - Sat, Nov 1
ORD
O'Hare Intl.
BOS
Logan Intl.
$144 Roundtrip, found 11 hours ago
$144
Roundtrip
found 11 hours ago
Select United flight, departing Thu, Oct 30 from O'Hare Intl. to Logan Intl., returning Sat, Nov 1, priced at $144 found 11 hours ago
Thu, Nov 6 - Mon, Nov 10
ORD
O'Hare Intl.
BOS
Logan Intl.
$146 Roundtrip, just found
$146
Roundtrip
just found
Select United flight, departing Thu, Nov 6 from O'Hare Intl. to Logan Intl., returning Mon, Nov 10, priced at $146 just found
Fri, Jan 30 - Tue, Feb 3
ORD
O'Hare Intl.
BOS
Logan Intl.
$149 Roundtrip, found 4 hours ago
$149
Roundtrip
found 4 hours ago
Select United flight, departing Fri, Jan 30 from O'Hare Intl. to Logan Intl., returning Tue, Feb 3, priced at $149 found 4 hours ago
Thu, Nov 13 - Sun, Nov 16
ORD
O'Hare Intl.
BOS
Logan Intl.
$151 Roundtrip, just found
$151
Roundtrip
just found
Select United flight, departing Thu, Nov 13 from O'Hare Intl. to Logan Intl., returning Sun, Nov 16, priced at $151 just found
Fri, Jan 30 - Tue, Feb 3
ORD
O'Hare Intl.
BOS
Logan Intl.
$151 Roundtrip, found 4 hours ago
$151
Roundtrip
found 4 hours ago
Select United flight, departing Fri, Jan 30 from O'Hare Intl. to Logan Intl., returning Tue, Feb 3, priced at $151 found 4 hours ago
Mon, Dec 8 - Thu, Dec 11
ORD
O'Hare Intl.
BOS
Logan Intl.
$152 Roundtrip, found 7 hours ago
$152
Roundtrip
found 7 hours ago
Select United flight, departing Mon, Dec 8 from O'Hare Intl. to Logan Intl., returning Thu, Dec 11, priced at $152 found 7 hours ago
Thu, Nov 6 - Mon, Nov 10
ORD
O'Hare Intl.
BOS
Logan Intl.
$164 Roundtrip, just found
$164
Roundtrip
just found
Select United flight, departing Thu, Nov 6 from O'Hare Intl. to Logan Intl., returning Mon, Nov 10, priced at $164 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.