$59 Cheap United flights St. Louis (STL) to Houston (IAH)

View $59 flight on Wed, Aug 20, 2025Opens in a new window

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$59 Cheap United flights St. Louis (STL) to Houston (IAH)

Prices were available within the past 7 days and start at $59 for one-way flights and $117 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Sep 24 - Sat, Oct 4
STL
St. Louis
IAH
Houston
$117 Roundtrip, found 4 hours ago
$117
Roundtrip
found 4 hours ago
Select United flight, departing Wed, Sep 24 from St. Louis to Houston, returning Sat, Oct 4, priced at $117 found 4 hours ago
United
Sat, Sep 20 - Tue, Sep 30
STL
St. Louis
IAH
Houston
$130 Roundtrip, found 4 hours ago
$130
Roundtrip
found 4 hours ago
Select United flight, departing Sat, Sep 20 from St. Louis to Houston, returning Tue, Sep 30, priced at $130 found 4 hours ago
United
Wed, Oct 1 - Sat, Oct 11
STL
St. Louis
IAH
Houston
$136 Roundtrip, found 4 hours ago
$136
Roundtrip
found 4 hours ago
Select United flight, departing Wed, Oct 1 from St. Louis to Houston, returning Sat, Oct 11, priced at $136 found 4 hours ago
United
Sun, Oct 5 - Wed, Oct 15
STL
St. Louis
IAH
Houston
$137 Roundtrip, found 4 hours ago
$137
Roundtrip
found 4 hours ago
Select United flight, departing Sun, Oct 5 from St. Louis to Houston, returning Wed, Oct 15, priced at $137 found 4 hours ago
United
Sat, Aug 30 - Tue, Sep 2
STL
St. Louis
IAH
Houston
$140 Roundtrip, found 3 hours ago
$140
Roundtrip
found 3 hours ago
Select United flight, departing Sat, Aug 30 from St. Louis to Houston, returning Tue, Sep 2, priced at $140 found 3 hours ago
United
Thu, Aug 14 - Thu, Aug 21
STL
St. Louis
IAH
Houston
$144 Roundtrip, found 10 hours ago
$144
Roundtrip
found 10 hours ago
Select United flight, departing Thu, Aug 14 from St. Louis to Houston, returning Thu, Aug 21, priced at $144 found 10 hours ago
Flights from St. Louis (STL) to Houston (IAH)
Origin airport
Lambert-St. Louis Intl.
Destination airport
George Bush Intercontinental
Airlines serving
American Airlines, Delta, Frontier Airlines, Spirit Airlines, United
Popular airline
American Airlines
Distance
667 mi
Average flight time
2 hours 58 mins

Frequently asked questions

How much is a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
Grab affordable return United Airlines flights from $117 from STL to IAH by filtering your results from "Price (lowest to highest)" on Expedia. Or look for deals from $59 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from STL to IAH with United Airlines?
November is one of the most affordable months to jet away to Houston with United Airlines. You could also find excellent prices on one-way and round-trip fares in February.
What is the cheapest time to book flights from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH) with United Airlines?
Begin your search one to three months ahead of your departure date to get cheaper fares on United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic journeys.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
United Airlines has direct flights from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH), with 20 departures each week. Just choose the "Nonstop" and "Airline" filters while searching on Expedia to find all direct United Airlines flights to IAH.
How long does it take to fly from STL to IAH with United Airlines?
Take off from Lambert-St. Louis Intl. Airport (STL) for George Bush Intercontinental Airport (IAH) on a nonstop United Airlines flight, and you'll be in the skies for approximately 2h 23m.
Which day of the week has the most United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
Thursday has the most United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH). With 3 daily departures, this is a great day to book something that will work for your schedule.
What is the earliest United Airlines flight from STL to IAH?
Taking off from STL at 6:15AM UTC-6, the earliest United Airlines flight to IAH lands at 8:40AM UTC-6. Traveling earlier in the day means you'll be less likely to encounter cancellations or delays.* Not a morning person? The last United Airlines flight from STL to IAH departs at 4:36PM UTC-6 and touches down at 6:55PM UTC-6.*Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Houston?
George Bush Intercontinental Airport (IAH) is the main gateway for United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Houston. But the airline also travels to William P. Hobby Airport (HOU). Make sure you select the "All Airports" option for your destination to see what's available for your journey to Houston.
Why fly with United Airlines from STL to IAH?
With a rewarding loyalty program, United Airlines is a favorite of many passengers departing from STL to IAH. Plus, if you're a United Mileage Plus and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
For the Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH) route, United Airlines typically flies Airbus A319 and Embraer 175 planes. Don't forget that last-minute changes are possible for operational demands, meaning your flight may be on another aircraft.
Can I change or cancel my United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
It's generally possible to cancel or change your flight, although there may be additional fees if you booked over 24 hours ago. Prefer to keep your options open? Make use of our "No cancel fee" and "Changes included" filters to find flights that won't charge you extra if you have to alter your plans. To modify your itinerary, go to "Trips," select your flight and click on "Manage Booking" for more information.

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