United Flight UA5421 Deals & Information (2025/2026)

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United Flight 5421 Route Deals From $60

The cheapest prices found with in the last 7 days for return flights were $188 and $60 for one-way flights to Preston Smith Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Jul 25 - Mon, Jul 28
DEN
Denver Intl.
LBB
Preston Smith Intl.
$188 Roundtrip, found 4 days ago
$188
Roundtrip
found 4 days ago
Select United flight, departing Fri, Jul 25 from Denver Intl. to Preston Smith Intl., returning Mon, Jul 28, priced at $188 found 4 days ago
Fri, Jul 25 - Mon, Jul 28
DEN
Denver Intl.
LBB
Preston Smith Intl.
$191 Roundtrip, found 4 days ago
$191
Roundtrip
found 4 days ago
Select United flight, departing Fri, Jul 25 from Denver Intl. to Preston Smith Intl., returning Mon, Jul 28, priced at $191 found 4 days ago
Fri, Jul 25 - Mon, Jul 28
DEN
Denver Intl.
LBB
Preston Smith Intl.
$236 Roundtrip, found 4 days ago
$236
Roundtrip
found 4 days ago
Select United flight, departing Fri, Jul 25 from Denver Intl. to Preston Smith Intl., returning Mon, Jul 28, priced at $236 found 4 days ago
Fri, May 30 - Mon, Jun 2
DEN
Denver Intl.
LBB
Preston Smith Intl.
$251 Roundtrip, found 1 day ago
$251
Roundtrip
found 1 day ago
Select United flight, departing Fri, May 30 from Denver Intl. to Preston Smith Intl., returning Mon, Jun 2, priced at $251 found 1 day ago
Fri, Jun 13 - Mon, Jun 16
DEN
Denver Intl.
LBB
Preston Smith Intl.
$268 Roundtrip, found 20 hours ago
$268
Roundtrip
found 20 hours ago
Select United flight, departing Fri, Jun 13 from Denver Intl. to Preston Smith Intl., returning Mon, Jun 16, priced at $268 found 20 hours 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.