United Flight WN5421 Deals & Information (2025/2026)

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United Flight 5421 Route Deals From $71

The cheapest prices found with in the last 7 days for return flights were $140 and $71 for one-way flights to Preston Smith Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Aug 14 - Tue, Aug 19
DEN
Denver Intl.
LBB
Preston Smith Intl.
$140 Roundtrip, found 4 days ago
$140
Roundtrip
found 4 days ago
Select United flight, departing Thu, Aug 14 from Denver Intl. to Preston Smith Intl., returning Tue, Aug 19, priced at $140 found 4 days ago
Thu, Aug 14 - Tue, Aug 19
DEN
Denver Intl.
LBB
Preston Smith Intl.
$149 Roundtrip, found 4 days ago
$149
Roundtrip
found 4 days ago
Select United flight, departing Thu, Aug 14 from Denver Intl. to Preston Smith Intl., returning Tue, Aug 19, priced at $149 found 4 days ago
Fri, Oct 10 - Mon, Oct 13
DEN
Denver Intl.
LBB
Preston Smith Intl.
$171 Roundtrip, found 2 days ago
$171
Roundtrip
found 2 days ago
Select United flight, departing Fri, Oct 10 from Denver Intl. to Preston Smith Intl., returning Mon, Oct 13, priced at $171 found 2 days ago
Fri, Oct 10 - Mon, Oct 13
DEN
Denver Intl.
LBB
Preston Smith Intl.
$198 Roundtrip, found 2 days ago
$198
Roundtrip
found 2 days ago
Select United flight, departing Fri, Oct 10 from Denver Intl. to Preston Smith Intl., returning Mon, Oct 13, priced at $198 found 2 days ago
Thu, Aug 14 - Tue, Aug 19
DEN
Denver Intl.
LBB
Preston Smith Intl.
$201 Roundtrip, found 4 days ago
$201
Roundtrip
found 4 days ago
Select United flight, departing Thu, Aug 14 from Denver Intl. to Preston Smith Intl., returning Tue, Aug 19, priced at $201 found 4 days ago
Thu, Aug 14 - Tue, Aug 19
DEN
Denver Intl.
LBB
Preston Smith Intl.
$216 Roundtrip, found 4 days ago
$216
Roundtrip
found 4 days ago
Select United flight, departing Thu, Aug 14 from Denver Intl. to Preston Smith Intl., returning Tue, Aug 19, priced at $216 found 4 days ago
Fri, Oct 10 - Mon, Oct 13
DEN
Denver Intl.
LBB
Preston Smith Intl.
$236 Roundtrip, found 2 days ago
$236
Roundtrip
found 2 days ago
Select United flight, departing Fri, Oct 10 from Denver Intl. to Preston Smith Intl., returning Mon, Oct 13, priced at $236 found 2 days ago

Frequently asked questions

What route does flight number UA5421 take?
UA5421 serves multiple routes, but the most common is between Fresno Yosemite Intl. Airport and Los Angeles Intl. Airport (LAX). If your flight goes direct, you'll disembark the plane in about 1 hour and 14 minutes. Multi-stop flights can also use this number, as can flights on other routes.
What kind of plane is on flight number UA5421?
UA5421 is a flight number that is used on a number of different routes. If you've booked a ticket on the busiest route, FAT to Los Angeles, CA Airport (LAX-Los Angeles Intl.), there's every chance you'll be hopping on board a Bombardier CRJ.
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 UA5421 flight with Travelocity, please visit our Customer Service Portal.