United Flight 5257 Deals & Information (2025/2026)

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United Flight 5257 Route Deals From $214

The cheapest prices found with in the last 7 days for return flights were $197 and $214 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Oct 14 - Tue, Oct 21
DEN
Denver Intl.
BIL
Logan Intl.
$197 Roundtrip, found 2 days ago
$197
Roundtrip
found 2 days ago
Select United flight, departing Tue, Oct 14 from Denver Intl. to Logan Intl., returning Tue, Oct 21, priced at $197 found 2 days ago
Tue, Oct 21 - Sun, Oct 26
DEN
Denver Intl.
BIL
Logan Intl.
$223 Roundtrip, just found
$223
Roundtrip
just found
Select United flight, departing Tue, Oct 21 from Denver Intl. to Logan Intl., returning Sun, Oct 26, priced at $223 just found
Thu, Oct 9 - Sat, Oct 11
DEN
Denver Intl.
BIL
Logan Intl.
$253 Roundtrip, found 1 hour ago
$253
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Oct 9 from Denver Intl. to Logan Intl., returning Sat, Oct 11, priced at $253 found 1 hour ago
Tue, Oct 14 - Tue, Oct 21
DEN
Denver Intl.
BIL
Logan Intl.
$258 Roundtrip, found 2 days ago
$258
Roundtrip
found 2 days ago
Select United flight, departing Tue, Oct 14 from Denver Intl. to Logan Intl., returning Tue, Oct 21, priced at $258 found 2 days ago
Tue, Oct 21 - Sun, Oct 26
DEN
Denver Intl.
BIL
Logan Intl.
$264 Roundtrip, just found
$264
Roundtrip
just found
Select United flight, departing Tue, Oct 21 from Denver Intl. to Logan Intl., returning Sun, Oct 26, priced at $264 just found
Sat, Nov 8 - Sat, Nov 15
DEN
Denver Intl.
BIL
Logan Intl.
$271 Roundtrip, found 6 days ago
$271
Roundtrip
found 6 days ago
Select United flight, departing Sat, Nov 8 from Denver Intl. to Logan Intl., returning Sat, Nov 15, priced at $271 found 6 days ago
Tue, Oct 21 - Sun, Oct 26
DEN
Denver Intl.
BIL
Logan Intl.
$306 Roundtrip, just found
$306
Roundtrip
just found
Select United flight, departing Tue, Oct 21 from Denver Intl. to Logan Intl., returning Sun, Oct 26, priced at $306 just found
Wed, Oct 8 - Mon, Oct 13
DEN
Denver Intl.
BIL
Logan Intl.
$309 Roundtrip, just found
$309
Roundtrip
just found
Select United flight, departing Wed, Oct 8 from Denver Intl. to Logan Intl., returning Mon, Oct 13, priced at $309 just found
Thu, Oct 9 - Sat, Oct 11
DEN
Denver Intl.
BIL
Logan Intl.
$314 Roundtrip, found 1 hour ago
$314
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Oct 9 from Denver Intl. to Logan Intl., returning Sat, Oct 11, priced at $314 found 1 hour ago
Tue, Oct 21 - Sun, Oct 26
DEN
Denver Intl.
BIL
Logan Intl.
$330 Roundtrip, just found
$330
Roundtrip
just found
Select United flight, departing Tue, Oct 21 from Denver Intl. to Logan Intl., returning Sun, Oct 26, priced at $330 just found
Tue, Oct 21 - Sun, Oct 26
DEN
Denver Intl.
BIL
Logan Intl.
$350 Roundtrip, just found
$350
Roundtrip
just found
Select United flight, departing Tue, Oct 21 from Denver Intl. to Logan Intl., returning Sun, Oct 26, priced at $350 just found

Frequently asked questions

What route does flight number UA5257 take?
UA5257 is used on multiple routes, but the most common is between Denver, CO Airport (DEN-Denver Intl.) and Pitkin County Airport (ASE). If you manage to score a direct flight, you'll disembark the plane in about 48 minutes. Multi-stop flights can also travel under the same number, as can flights on other routes.
What kind of plane is on flight number UA5257?
If you have a seat on flight UA5257 from DIA airport to Aspen, CO Airport (ASE-Pitkin County), you'll most likely be heading off on the Bombardier CRJ700. Flight UA5257 serves multiple routes, but this is the most popular one.
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 UA5257 flight with Travelocity, please visit our Customer Service Portal.