United Flight 646 Deals & Information (2026/2027)

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United Flight 646 Route Deals From $267

The cheapest prices found with in the last 7 days for return flights were $279 and $267 for one-way flights to San Francisco Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Apr 24 - Wed, Apr 29
MSY
Louis Armstrong New Orleans Intl.
SFO
San Francisco Intl.
$279 Roundtrip, found 18 hours ago
$279
Roundtrip
found 18 hours ago
Select United flight, departing Fri, Apr 24 from Louis Armstrong New Orleans Intl. to San Francisco Intl., returning Wed, Apr 29, priced at $279 found 18 hours ago
Wed, Feb 25 - Sat, Feb 28
MSY
Louis Armstrong New Orleans Intl.
SFO
San Francisco Intl.
$339 Roundtrip, found 2 days ago
$339
Roundtrip
found 2 days ago
Select United flight, departing Wed, Feb 25 from Louis Armstrong New Orleans Intl. to San Francisco Intl., returning Sat, Feb 28, priced at $339 found 2 days ago

Frequently asked questions

What route does flight number UA646 take?
UA646 flies directly between Salt Lake City, UT Airport (SLC-Salt Lake City Intl.) and Houston, TX Airport (IAH-George Bush Intercontinental) in roughly 2 hours and 58 minutes. It can sometimes be used on other routes though, some of which could be multi-stop journeys. Keep an eye out for this when locking in your airfare to avoid any mix-ups.
What kind of plane is on flight number UA646?
It's likely you'll be heading off on a Boeing 737-800 if you're flying from Salt Lake City Intl. Airport to George Bush Intercontinental Airport (IAH), the most popular route for flight UA646.
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 UA646 flight with Travelocity, please visit our Customer Service Portal.