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$64+ Cheap flights from George Bush Intcntl (IAH) to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — STL
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
1 adult, Economy
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Cheapflights Tip: The best prices from Houston George Bush Intcntl to Lambert-St Louis are usually found in October or May, booked 21 days in advance, depart on a Friday or Saturday and return on a Friday

Cheap flight deals from George Bush Intcntl to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from George Bush Intcntl (IAH) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$131
(Kiwi.com)

One-way from

$64
(United Airlines)

Popular in

February

Cheapest in

October

Average price

$332

Good round-trip deal

$317 or less

Good one-way deal

$197 or less
Provider with most accurate pricing for Houston George Bush Intcntl-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Houston George Bush Intcntl-Lambert-St Louis flights.
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From Houston George Bush Intcntl to Lambert-St Louis
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One-way flight from Houston George Bush Intcntl to Lambert-St Louis
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Highest demand for flights based on searches. 5% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Houston George Bush Intcntl to Lambert-St Louis.
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Price to beat on a one-way flight from Houston George Bush Intcntl to Lambert-St Louis.
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Find flight deals from George Bush Intcntl to St. Louis

Cheapest flights from George Bush Intcntl to St. Louis
Explore the most affordable flight options available from George Bush Intcntl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 22, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/42:09 pmIAH - STL
1 stop18h 58mFrontier
Tue 11/117:45 pmSTL - IAH
1 stop16h 54mFrontier
Deal found 10/20$131
This Frontier deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/18:48 pmIAH - STL
1 stop13h 19mFrontier
Mon 11/312:09 pmSTL - IAH
1 stop8h 17mFrontier
Deal found 10/19$144
This Booking.com deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/318:47 pmIAH - STL
1 stop12h 20mFrontier
Sun 11/211:27 amSTL - IAH
1 stop10h 36mFrontier
Deal found 10/19$145
This Kiwi.com deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:00 amIAH - STL
1 stop26h 07mFrontier
Tue 11/47:45 pmSTL - IAH
1 stop16h 54mFrontier
Deal found 10/20$146
This Frontier deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/410:28 pmIAH - STL
1 stop12h 54mFrontier
Mon 12/812:07 pmSTL - IAH
1 stop9h 40mFrontier
Deal found 10/20$150
This Flightnetwork deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/42:09 pmIAH - STL
1 stop18h 58mFrontier
Sat 11/87:45 pmSTL - IAH
1 stop14h 52mFrontier
Deal found 10/20$151
This Booking.com deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/87:00 amIAH - STL
1 stop26h 07mFrontier
Wed 11/127:45 pmSTL - IAH
1 stop14h 52mFrontier
Deal found 10/21$152
This Kiwi.com deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/115:02 pmIAH - STL
1 stop16h 45mFrontier
Sun 12/1410:42 amSTL - IAH
1 stop12h 08mFrontier
Deal found 10/21$154
This Priceline deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/277:49 amIAH - STL
1 stop9h 21mFrontier
Mon 11/312:09 pmSTL - IAH
1 stop8h 17mFrontier
Deal found 10/20$156
This Booking.com deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/258:37 pmIAH - STL
1 stop16h 09mFrontier
Mon 10/276:05 pmSTL - IAH
1 stop15h 28mFrontier
Deal found 10/19$158

Cheapflights Fare Finder

 
Customize your flight search to find flights from George Bush Intcntl to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 22, 2025.
Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to St. Louis that are best for you.

Fly from

George Bush Intcntl

Fly to

St. Louis

Route

Depart

Return

Price

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 12/11

5:02 pm-9:47 am

1 stop16h 45m

Lambert-St Louis

Sun 12/14

10:42 am-10:50 pm

1 stop12h 08m

$154

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 11/4

2:09 pm-9:07 am

1 stop18h 58m

Lambert-St Louis

Thu 11/6

11:07 am-12:08 am

2 stops13h 01m

$171

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 1/12

6:00 pm-11:40 pm

1 stop5h 40m

Lambert-St Louis

Mon 1/19

10:00 am-5:43 pm

1 stop7h 43m

$183

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 12/11

7:55 pm-9:58 pm

Nonstop2h 03m

Lambert-St Louis

Sun 12/14

6:15 am-8:34 am

Nonstop2h 19m

$207

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 12/11

6:40 am-12:04 pm

1 stop5h 24m

Lambert-St Louis

Thu 12/11

7:02 pm-11:59 pm

1 stop4h 57m

$231

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 11/20

6:21 pm-11:57 pm

2 stops29h 36m

Lambert-St Louis

Thu 11/27

10:53 am-9:01 am

1 stop22h 08m

$268

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 11/19

8:00 am-11:01 pm

1 stop15h 01m

Lambert-St Louis

Wed 11/26

7:03 pm-7:00 pm

2 stops23h 57m

$269

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 12/11

7:55 pm-9:58 pm

Nonstop2h 03m

Lambert-St Louis

Sun 12/28

6:00 am-8:29 am

Nonstop2h 29m

$279

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 12/25

7:45 am-9:49 am

Nonstop2h 04m

Lambert-St Louis

Sun 12/28

6:00 am-8:29 am

Nonstop2h 29m

$279

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Sat 12/20

6:38 pm-11:42 pm

1 stop5h 04m

Lambert-St Louis

Mon 1/5

7:05 pm-11:59 pm

1 stop4h 54m

$299

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

Showing 1-10 of 18 results
1
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Compare providers for flights from George Bush Intcntl to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from George Bush Intcntl to St. Louis in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Houston George Bush Intcntl Airport-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Houston George Bush Intcntl Airport-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Houston George Bush Intcntl Airport-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Houston George Bush Intcntl Airport-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Houston George Bush Intcntl Airport-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from George Bush Intcntl to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from George Bush Intcntl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Houston George Bush Intcntl Airport to St. Louis

How far ahead should I book a flight from Houston George Bush Intcntl Airport to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from George Bush Intcntl to St. Louis. Price data was last updated on October 17, 2025.

Booking 21 days in advance of your planned departure date is, on average, the best time to get cheap flights from Houston George Bush Intcntl Airport to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Houston George Bush Intcntl Airport to St. Louis?

Currently, October is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to St. Louis (average of $117). Flying from Houston George Bush Intcntl Airport to St. Louis in February is currently the most expensive (average of $270). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IAH to STL?

Find hourly flight availability from George Bush Intcntl to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 22, 2025.

When flying from Houston George Bush Intcntl Airport to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 30% versus a flight in the morning.

What is the cheapest day to fly from Houston George Bush Intcntl Airport to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from George Bush Intcntl to St. Louis. Price data was last updated on October 19, 2025.

Travelers seeking maximum savings on their Houston George Bush Intcntl Airport to St. Louis flight should consider departing on Friday afternoons when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

The best insider tips for Houston George Bush Intcntl Airport to St. Louis flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Houston George Bush Intcntl Airport to St. Louis trip
Airports
IAH

Check the IAH Depart tab online for current security wait times to plan your arrival at the airport efficiently.

Read more about IAHby Evie Carrick
STL

Use the MetroLink light rail for a convenient and economical way to reach downtown St. Louis from STL Airport.

Read more about STLby Taryn White
Our travel experts
Evie Carrick

Evie Carrick

Expert on IAH

Evie Carrick

Evie Carrick

Evie Carrick is a writer and editor who has lived in five countries and traveled to over 50, with extensive experience flying around the world. She was born in Colorado, but has spent time flying to both coasts to visit family. She writes regularly for Travel + Leisure, BuzzFeed, and SKI and recently published seven travel journals with Simon & Schuster.

Read more
Taryn White

Taryn White

Expert on STL

Taryn White

Taryn White

Taryn White is a freelance travel writer, digital creator, and travel advisor who has visited nearly 100 countries and all 50 states. She’s familiar with many airports and enjoys beach hopping, boutique hotels, spa experiences, and exploring local culture. Her work has appeared in Travel + Leisure, Condé Nast Traveler, National Geographic, Smithsonian Magazine, AFAR, and more.

Read more

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated October 22, 2025.
Read reviews from past customers who have flown United Airlines, American Airlines, and Frontier from Houston George Bush Intcntl Airport to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,988 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
8,988 reviews
United Airlines
7.4
Good
8,988 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
American Airlines
7.2
Good
11,028 reviews
United Airlines
7.4
Good
8,988 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Frontier
5.8
Fair
3,130 reviews
United Airlines
7.4
Good
8,988 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

Related info for your journey

Find useful and relevant information for your journey from George Bush Intcntl to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Houston George Bush Intcntl?

    Lambert-St Louis (STL) is the airport you will fly into if you book a flight from Houston George Bush Intcntl to St. Louis. You should not have trouble finding flights to Lambert-St Louis from Houston George Bush Intcntl; the airport handles an average of 9 inbound flights from Houston George Bush Intcntl per day. You should also have plenty of airline options to choose from since 3 airlines have flights to the St. Louis airport from Houston George Bush Intcntl. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

  • How long is the flight from Houston George Bush Intcntl Airport to St. Louis?

    Airlines like Frontier, Delta, and United Airlines fly from Houston George Bush Intcntl Airport to St. Louis in about 2h 03m. The time it takes to get you to your destination can typically vary by up to 14h 42m. There are 668 mi between Houston George Bush Intcntl Airport and St. Louis. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Houston George Bush Intcntl Airport to St. Louis round-trip?

    According to our current data, Frontier ($109), United Airlines ($177), and American Airlines ($180) offers the cheapest pricing from Houston George Bush Intcntl Airport to St. Louis. These flights start at 71% lower than the current average price 3 months from now.

  • What are the most reliable airlines from Houston George Bush Intcntl Airport to St. Louis?

    The top 3 most reliable airlines when flying from Houston George Bush Intcntl Airport to St. Louis are CommutAir (100%), Mesa Airlines (89%) and ANA (89%).

  • What are the cheapest flights from Houston George Bush Intcntl Airport to St. Louis?

    The cheapest flight price from Houston George Bush Intcntl Airport to St. Louis is $57. On average you can expect to pay $342. The most popular route, (Houston George Bush Intcntl - Lambert-St Louis), can usually be booked for $163.

  • Can I find deals for flights from George Bush Intcntl to St. Louis that include hotel bookings?

    Yes. In addition to deals on George Bush Intcntl to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from George Bush Intcntl to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from George Bush Intcntl to St. Louis.

  • Can I find deals for business class flights from George Bush Intcntl to St. Louis?

    Yes. Cheapflights offers flight deals from George Bush Intcntl to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Houston George Bush Intcntl Airport to St. Louis?

    Currently, October is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to St. Louis (average of $117). Flying from Houston George Bush Intcntl Airport to St. Louis in February is currently the most expensive (average of $270). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
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Top 3 airlines flying from George Bush Intcntl to St. Louis

Discover the top 3 airlines that operate flights from George Bush Intcntl to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$109Average$230FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$177Average$378FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$180Average$350FlexibilityNo cancel feeOn-time71%

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