United Flight 1257 Deals & Information (2026/2027)

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United Flight 1257 Route Deals From $405

The cheapest prices found with in the last 7 days for return flights were $249 and $405 for one-way flights to San Francisco Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Jan 13 - Wed, Jan 27
MIA
Miami Intl.
SFO
San Francisco Intl.
$249 Roundtrip, just found
$249
Roundtrip
just found
Select United flight, departing Wed, Jan 13 from Miami Intl. to San Francisco Intl., returning Wed, Jan 27, priced at $249 just found
Wed, Oct 21 - Sun, Oct 25
MIA
Miami Intl.
SFO
San Francisco Intl.
$255 Roundtrip, found 1 day ago
$255
Roundtrip
found 1 day ago
Select United flight, departing Wed, Oct 21 from Miami Intl. to San Francisco Intl., returning Sun, Oct 25, priced at $255 found 1 day ago
Wed, Jan 13 - Wed, Jan 27
MIA
Miami Intl.
SFO
San Francisco Intl.
$259 Roundtrip, just found
$259
Roundtrip
just found
Select United flight, departing Wed, Jan 13 from Miami Intl. to San Francisco Intl., returning Wed, Jan 27, priced at $259 just found
Fri, Oct 2 - Sat, Oct 3
MIA
Miami Intl.
SFO
San Francisco Intl.
$263 Roundtrip, found 6 days ago
$263
Roundtrip
found 6 days ago
Select United flight, departing Fri, Oct 2 from Miami Intl. to San Francisco Intl., returning Sat, Oct 3, priced at $263 found 6 days ago
Thu, Jul 2 - Sat, Jul 25
MIA
Miami Intl.
SFO
San Francisco Intl.
$265 Roundtrip, found 6 days ago
$265
Roundtrip
found 6 days ago
Select United flight, departing Thu, Jul 2 from Miami Intl. to San Francisco Intl., returning Sat, Jul 25, priced at $265 found 6 days ago
Wed, Jan 13 - Wed, Jan 27
MIA
Miami Intl.
SFO
San Francisco Intl.
$277 Roundtrip, just found
$277
Roundtrip
just found
Select United flight, departing Wed, Jan 13 from Miami Intl. to San Francisco Intl., returning Wed, Jan 27, priced at $277 just found
Fri, Sep 18 - Tue, Sep 22
MIA
Miami Intl.
SFO
San Francisco Intl.
$283 Roundtrip, found 1 day ago
$283
Roundtrip
found 1 day ago
Select United flight, departing Fri, Sep 18 from Miami Intl. to San Francisco Intl., returning Tue, Sep 22, priced at $283 found 1 day ago
Wed, Jan 13 - Wed, Jan 27
MIA
Miami Intl.
SFO
San Francisco Intl.
$287 Roundtrip, just found
$287
Roundtrip
just found
Select United flight, departing Wed, Jan 13 from Miami Intl. to San Francisco Intl., returning Wed, Jan 27, priced at $287 just found
Thu, Jul 16 - Fri, Jul 31
MIA
Miami Intl.
SFO
San Francisco Intl.
$289 Roundtrip, found 2 days ago
$289
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jul 16 from Miami Intl. to San Francisco Intl., returning Fri, Jul 31, priced at $289 found 2 days ago
Fri, Sep 18 - Tue, Sep 22
MIA
Miami Intl.
SFO
San Francisco Intl.
$292 Roundtrip, found 1 day ago
$292
Roundtrip
found 1 day ago
Select United flight, departing Fri, Sep 18 from Miami Intl. to San Francisco Intl., returning Tue, Sep 22, priced at $292 found 1 day ago
Wed, Jan 13 - Wed, Jan 27
MIA
Miami Intl.
SFO
San Francisco Intl.
$297 Roundtrip, just found
$297
Roundtrip
just found
Select United flight, departing Wed, Jan 13 from Miami Intl. to San Francisco Intl., returning Wed, Jan 27, priced at $297 just found
Sat, Oct 3 - Sat, Oct 10
MIA
Miami Intl.
SFO
San Francisco Intl.
$298 Roundtrip, found 6 hours ago
$298
Roundtrip
found 6 hours ago
Select United flight, departing Sat, Oct 3 from Miami Intl. to San Francisco Intl., returning Sat, Oct 10, priced at $298 found 6 hours ago
Wed, Jan 13 - Wed, Jan 27
MIA
Miami Intl.
SFO
San Francisco Intl.
$303 Roundtrip, just found
$303
Roundtrip
just found
Select United flight, departing Wed, Jan 13 from Miami Intl. to San Francisco Intl., returning Wed, Jan 27, priced at $303 just found