United Flight UA6138 Deals & Information (2025/2026)

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United Flight 6138 Route Deals From $49

The cheapest prices found with in the last 7 days for return flights were $97 and $49 for one-way flights to San Antonio Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Sep 22 - Wed, Sep 24
IAH
George Bush Intercontinental
SAT
San Antonio Intl.
$97 Roundtrip, found 3 days ago
$97
Roundtrip
found 3 days ago
Select United flight, departing Mon, Sep 22 from George Bush Intercontinental to San Antonio Intl., returning Wed, Sep 24, priced at $97 found 3 days ago
Mon, Sep 22 - Wed, Sep 24
IAH
George Bush Intercontinental
SAT
San Antonio Intl.
$114 Roundtrip, found 3 days ago
$114
Roundtrip
found 3 days ago
Select United flight, departing Mon, Sep 22 from George Bush Intercontinental to San Antonio Intl., returning Wed, Sep 24, priced at $114 found 3 days ago
Tue, Oct 14 - Thu, Oct 16
IAH
George Bush Intercontinental
SAT
San Antonio Intl.
$116 Roundtrip, found 3 days ago
$116
Roundtrip
found 3 days ago
Select United flight, departing Tue, Oct 14 from George Bush Intercontinental to San Antonio Intl., returning Thu, Oct 16, priced at $116 found 3 days ago
Mon, Sep 22 - Wed, Sep 24
IAH
George Bush Intercontinental
SAT
San Antonio Intl.
$124 Roundtrip, found 3 days ago
$124
Roundtrip
found 3 days ago
Select United flight, departing Mon, Sep 22 from George Bush Intercontinental to San Antonio Intl., returning Wed, Sep 24, priced at $124 found 3 days ago
Thu, Aug 7 - Sat, Aug 9
IAH
George Bush Intercontinental
SAT
San Antonio Intl.
$126 Roundtrip, found 2 days ago
$126
Roundtrip
found 2 days ago
Select United flight, departing Thu, Aug 7 from George Bush Intercontinental to San Antonio Intl., returning Sat, Aug 9, priced at $126 found 2 days ago
Mon, Sep 22 - Wed, Sep 24
IAH
George Bush Intercontinental
SAT
San Antonio Intl.
$141 Roundtrip, found 3 days ago
$141
Roundtrip
found 3 days ago
Select United flight, departing Mon, Sep 22 from George Bush Intercontinental to San Antonio Intl., returning Wed, Sep 24, priced at $141 found 3 days ago
Thu, Aug 7 - Sat, Aug 9
IAH
George Bush Intercontinental
SAT
San Antonio Intl.
$142 Roundtrip, found 2 days ago
$142
Roundtrip
found 2 days ago
Select United flight, departing Thu, Aug 7 from George Bush Intercontinental to San Antonio Intl., returning Sat, Aug 9, priced at $142 found 2 days ago
Mon, Sep 22 - Wed, Sep 24
IAH
George Bush Intercontinental
SAT
San Antonio Intl.
$148 Roundtrip, found 3 days ago
$148
Roundtrip
found 3 days ago
Select United flight, departing Mon, Sep 22 from George Bush Intercontinental to San Antonio Intl., returning Wed, Sep 24, priced at $148 found 3 days ago
Mon, Sep 22 - Wed, Sep 24
IAH
George Bush Intercontinental
SAT
San Antonio Intl.
$152 Roundtrip, found 3 days ago
$152
Roundtrip
found 3 days ago
Select United flight, departing Mon, Sep 22 from George Bush Intercontinental to San Antonio Intl., returning Wed, Sep 24, priced at $152 found 3 days ago
Sun, Oct 5 - Wed, Oct 8
IAH
George Bush Intercontinental
SAT
San Antonio Intl.
$154 Roundtrip, found 4 days ago
$154
Roundtrip
found 4 days ago
Select United flight, departing Sun, Oct 5 from George Bush Intercontinental to San Antonio Intl., returning Wed, Oct 8, priced at $154 found 4 days ago

Frequently asked questions

What route does flight number UA6138 take?
UA6138 flies straight between Nashville, TN Airport (BNA-Nashville Intl.) and IAH in about 2 hours and 12 minutes. It can sometimes take other routes though, some of which may be multi-stop flights. Keep an eye out for this when booking your airfare to avoid any mix-ups.
What kind of plane is on flight number UA6138?
If you're booked on flight UA6138 from Nashville International Airport to Houston, TX Airport (IAH-George Bush Intercontinental), you'll likely be setting off on an Embraer 175. This flight number serves more than one route, but this is the most popular.
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 UA6138 flight with Travelocity, please visit our Customer Service Portal.