United Flight UA424 Deals & Information (2025/2026)

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United Flight 424 Route Deals From $254

The cheapest prices found with in the last 7 days for return flights were $249 and $254 for one-way flights to San Antonio Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Sep 24 - Sat, Sep 27
SFO
San Francisco Intl.
SAT
San Antonio Intl.
$249 Roundtrip, found 1 day ago
$249
Roundtrip
found 1 day ago
Select United flight, departing Wed, Sep 24 from San Francisco Intl. to San Antonio Intl., returning Sat, Sep 27, priced at $249 found 1 day ago
Thu, Aug 21 - Sun, Aug 24
SFO
San Francisco Intl.
SAT
San Antonio Intl.
$254 Roundtrip, found 1 day ago
$254
Roundtrip
found 1 day ago
Select United flight, departing Thu, Aug 21 from San Francisco Intl. to San Antonio Intl., returning Sun, Aug 24, priced at $254 found 1 day ago
Wed, Sep 24 - Sat, Sep 27
SFO
San Francisco Intl.
SAT
San Antonio Intl.
$259 Roundtrip, found 1 day ago
$259
Roundtrip
found 1 day ago
Select United flight, departing Wed, Sep 24 from San Francisco Intl. to San Antonio Intl., returning Sat, Sep 27, priced at $259 found 1 day ago
Sat, Jul 19 - Sat, Aug 2
SFO
San Francisco Intl.
SAT
San Antonio Intl.
$264 Roundtrip, found 10 hours ago
$264
Roundtrip
found 10 hours ago
Select United flight, departing Sat, Jul 19 from San Francisco Intl. to San Antonio Intl., returning Sat, Aug 2, priced at $264 found 10 hours ago
Sat, Jul 19 - Sat, Aug 2
SFO
San Francisco Intl.
SAT
San Antonio Intl.
$287 Roundtrip, found 10 hours ago
$287
Roundtrip
found 10 hours ago
Select United flight, departing Sat, Jul 19 from San Francisco Intl. to San Antonio Intl., returning Sat, Aug 2, priced at $287 found 10 hours ago
Mon, Sep 8 - Mon, Sep 22
SFO
San Francisco Intl.
SAT
San Antonio Intl.
$290 Roundtrip, found 2 days ago
$290
Roundtrip
found 2 days ago
Select United flight, departing Mon, Sep 8 from San Francisco Intl. to San Antonio Intl., returning Mon, Sep 22, priced at $290 found 2 days ago
Sat, Jul 19 - Sat, Aug 2
SFO
San Francisco Intl.
SAT
San Antonio Intl.
$291 Roundtrip, found 10 hours ago
$291
Roundtrip
found 10 hours ago
Select United flight, departing Sat, Jul 19 from San Francisco Intl. to San Antonio Intl., returning Sat, Aug 2, priced at $291 found 10 hours ago
Mon, Sep 8 - Mon, Sep 22
SFO
San Francisco Intl.
SAT
San Antonio Intl.
$300 Roundtrip, found 2 days ago
$300
Roundtrip
found 2 days ago
Select United flight, departing Mon, Sep 8 from San Francisco Intl. to San Antonio Intl., returning Mon, Sep 22, priced at $300 found 2 days ago