United Flight 538 Deals & Information (2025/2026)

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United Flight 538 Route Deals From $121

The cheapest prices found with in the last 7 days for return flights were $237 and $121 for one-way flights to San Francisco Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Oct 18 - Sat, Nov 1
EWR
Newark Liberty Intl. Airport
SFO
San Francisco Intl.
$237 Roundtrip, just found
$237
Roundtrip
just found
Select United flight, departing Sat, Oct 18 from Newark Liberty Intl. Airport to San Francisco Intl., returning Sat, Nov 1, priced at $237 just found
Sat, Oct 4 - Mon, Oct 6
EWR
Newark Liberty Intl. Airport
SFO
San Francisco Intl.
$240 Roundtrip, just found
$240
Roundtrip
just found
Select United flight, departing Sat, Oct 4 from Newark Liberty Intl. Airport to San Francisco Intl., returning Mon, Oct 6, priced at $240 just found

Frequently asked questions

What route does flight number UA538 take?
UA538 flies straight from DEN to Sacramento, CA Airport (SMF-Sacramento Intl.) in around 2 hours and 30 minutes. It can sometimes be used on other routes though, some of which may be multi-stop flights. Keep this in mind when booking your seat to avoid any mix-ups.
What kind of plane is on flight number UA538?
There's a good chance you'll be on the Boeing 737-800 if you've booked a fare from Denver, CO Airport (DEN-Denver Intl.) to Sacramento Airport, one of several routes used for flight UA538.
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 UA538 flight with Travelocity, please visit our Customer Service Portal.