United Flight UA393 Deals & Information (2025/2026)

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United Flight 393 Route Deals From $40

The cheapest prices found with in the last 7 days for return flights were $98 and $40 for one-way flights to San Francisco Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Oct 31 - Mon, Nov 3
ONT
Los Angeles - Ontario Intl.
SFO
San Francisco Intl.
$98 Roundtrip, just found
$98
Roundtrip
just found
Select United flight, departing Fri, Oct 31 from Los Angeles - Ontario Intl. to San Francisco Intl., returning Mon, Nov 3, priced at $98 just found
Fri, Oct 31 - Mon, Nov 3
ONT
Los Angeles - Ontario Intl.
SFO
San Francisco Intl.
$100 Roundtrip, just found
$100
Roundtrip
just found
Select United flight, departing Fri, Oct 31 from Los Angeles - Ontario Intl. to San Francisco Intl., returning Mon, Nov 3, priced at $100 just found
Tue, Oct 14 - Sat, Oct 18
ONT
Los Angeles - Ontario Intl.
SFO
San Francisco Intl.
$117 Roundtrip, found 4 days ago
$117
Roundtrip
found 4 days ago
Select United flight, departing Tue, Oct 14 from Los Angeles - Ontario Intl. to San Francisco Intl., returning Sat, Oct 18, priced at $117 found 4 days ago
Mon, Oct 27 - Mon, Nov 3
ONT
Los Angeles - Ontario Intl.
SFO
San Francisco Intl.
$119 Roundtrip, found 19 hours ago
$119
Roundtrip
found 19 hours ago
Select United flight, departing Mon, Oct 27 from Los Angeles - Ontario Intl. to San Francisco Intl., returning Mon, Nov 3, priced at $119 found 19 hours ago
Fri, Oct 31 - Mon, Nov 3
ONT
Los Angeles - Ontario Intl.
SFO
San Francisco Intl.
$129 Roundtrip, just found
$129
Roundtrip
just found
Select United flight, departing Fri, Oct 31 from Los Angeles - Ontario Intl. to San Francisco Intl., returning Mon, Nov 3, priced at $129 just found
Sat, Oct 18 - Tue, Oct 21
ONT
Los Angeles - Ontario Intl.
SFO
San Francisco Intl.
$137 Roundtrip, found 19 hours ago
$137
Roundtrip
found 19 hours ago
Select United flight, departing Sat, Oct 18 from Los Angeles - Ontario Intl. to San Francisco Intl., returning Tue, Oct 21, priced at $137 found 19 hours ago
Sat, Oct 4 - Mon, Oct 6
ONT
Los Angeles - Ontario Intl.
SFO
San Francisco Intl.
$142 Roundtrip, found 2 hours ago
$142
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Oct 4 from Los Angeles - Ontario Intl. to San Francisco Intl., returning Mon, Oct 6, priced at $142 found 2 hours ago

Frequently asked questions

What route does flight number UA393 take?
UA393 is used on a range of routes. More commonly, UA393 flies direct from Washington Dulles Intl. Airport (IAD) to DIA airport. If you have a ticket on this route, you'll be in the air for roughly 3 hours and 55 minutes.
What kind of plane is on flight number UA393?
It's likely you'll be taking off on a Boeing 737-800 if you've booked a seat from IAD to Denver, CO Airport (DEN-Denver Intl.), one of a few routes used for flight UA393.
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 UA393 flight with Travelocity, please visit our Customer Service Portal.