United Flight 5257 Deals & Information (2026/2027)

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United Flight 5257 Route Deals From $248

The cheapest prices found with in the last 7 days for return flights were $249 and $248 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 18 - Sat, Aug 22
DEN
Denver Intl.
BIL
Logan Intl.
$249 Roundtrip, found 13 hours ago
$249
Roundtrip
found 13 hours ago
Select United flight, departing Tue, Aug 18 from Denver Intl. to Logan Intl., returning Sat, Aug 22, priced at $249 found 13 hours ago
Wed, Jul 29 - Mon, Aug 3
DEN
Denver Intl.
BIL
Logan Intl.
$255 Roundtrip, found 4 hours ago
$255
Roundtrip
found 4 hours ago
Select United flight, departing Wed, Jul 29 from Denver Intl. to Logan Intl., returning Mon, Aug 3, priced at $255 found 4 hours ago
Tue, Aug 11 - Sat, Aug 15
DEN
Denver Intl.
BIL
Logan Intl.
$257 Roundtrip, found 4 days ago
$257
Roundtrip
found 4 days ago
Select United flight, departing Tue, Aug 11 from Denver Intl. to Logan Intl., returning Sat, Aug 15, priced at $257 found 4 days ago
Thu, Oct 1 - Sat, Oct 3
DEN
Denver Intl.
BIL
Logan Intl.
$258 Roundtrip, found 1 day ago
$258
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 1 from Denver Intl. to Logan Intl., returning Sat, Oct 3, priced at $258 found 1 day ago
Fri, Sep 25 - Mon, Sep 28
DEN
Denver Intl.
BIL
Logan Intl.
$261 Roundtrip, found 6 days ago
$261
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 25 from Denver Intl. to Logan Intl., returning Mon, Sep 28, priced at $261 found 6 days ago
Thu, Jul 23 - Mon, Jul 27
DEN
Denver Intl.
BIL
Logan Intl.
$263 Roundtrip, found 2 days ago
$263
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jul 23 from Denver Intl. to Logan Intl., returning Mon, Jul 27, priced at $263 found 2 days ago
Wed, Jul 29 - Mon, Aug 3
DEN
Denver Intl.
BIL
Logan Intl.
$267 Roundtrip, found 4 hours ago
$267
Roundtrip
found 4 hours ago
Select United flight, departing Wed, Jul 29 from Denver Intl. to Logan Intl., returning Mon, Aug 3, priced at $267 found 4 hours ago
Thu, Jul 23 - Mon, Jul 27
DEN
Denver Intl.
BIL
Logan Intl.
$275 Roundtrip, found 2 days ago
$275
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jul 23 from Denver Intl. to Logan Intl., returning Mon, Jul 27, priced at $275 found 2 days ago
Wed, Jul 29 - Mon, Aug 3
DEN
Denver Intl.
BIL
Logan Intl.
$279 Roundtrip, found 4 hours ago
$279
Roundtrip
found 4 hours ago
Select United flight, departing Wed, Jul 29 from Denver Intl. to Logan Intl., returning Mon, Aug 3, priced at $279 found 4 hours ago
Thu, Oct 1 - Sat, Oct 3
DEN
Denver Intl.
BIL
Logan Intl.
$280 Roundtrip, found 1 day ago
$280
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 1 from Denver Intl. to Logan Intl., returning Sat, Oct 3, priced at $280 found 1 day ago
Mon, Jul 20 - Tue, Jul 28
DEN
Denver Intl.
BIL
Logan Intl.
$286 Roundtrip, found 1 day ago
$286
Roundtrip
found 1 day ago
Select United flight, departing Mon, Jul 20 from Denver Intl. to Logan Intl., returning Tue, Jul 28, priced at $286 found 1 day ago
Fri, Sep 25 - Mon, Sep 28
DEN
Denver Intl.
BIL
Logan Intl.
$288 Roundtrip, found 6 days ago
$288
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 25 from Denver Intl. to Logan Intl., returning Mon, Sep 28, priced at $288 found 6 days ago
Thu, Oct 1 - Sat, Oct 3
DEN
Denver Intl.
BIL
Logan Intl.
$289 Roundtrip, found 1 day ago
$289
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 1 from Denver Intl. to Logan Intl., returning Sat, Oct 3, priced at $289 found 1 day ago
Tue, Aug 11 - Sat, Aug 15
DEN
Denver Intl.
BIL
Logan Intl.
$290 Roundtrip, found 4 days ago
$290
Roundtrip
found 4 days ago
Select United flight, departing Tue, Aug 11 from Denver Intl. to Logan Intl., returning Sat, Aug 15, priced at $290 found 4 days ago
Thu, Oct 1 - Sat, Oct 3
DEN
Denver Intl.
BIL
Logan Intl.
$293 Roundtrip, found 1 day ago
$293
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 1 from Denver Intl. to Logan Intl., returning Sat, Oct 3, priced at $293 found 1 day ago
Fri, Sep 25 - Mon, Sep 28
DEN
Denver Intl.
BIL
Logan Intl.
$294 Roundtrip, found 6 days ago
$294
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 25 from Denver Intl. to Logan Intl., returning Mon, Sep 28, priced at $294 found 6 days ago
Fri, Sep 25 - Mon, Sep 28
DEN
Denver Intl.
BIL
Logan Intl.
$295 Roundtrip, found 6 days ago
$295
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 25 from Denver Intl. to Logan Intl., returning Mon, Sep 28, priced at $295 found 6 days ago

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.