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Flagstaff

$406+ Cheap flights from St. Louis to Flagstaff (STL - FLG)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FLG
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
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Cheap flight deals from St. Louis to Flagstaff

Cheapest flights from St. Louis to Flagstaff
Explore the most affordable flight options available from St. Louis to Flagstaff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 26, 2026.

This American Airlines deal was found by Cheapflights users on 1/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/122:37 pm
STL
-
FLG
1 stop6h 07m
American Airlines
Sat 5/1612:21 pm
FLG
-
STL
1 stop5h 09m
American Airlines
Deal found 1/24$406
This American Airlines deal was found by Cheapflights users on 1/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/97:15 am
STL
-
FLG
1 stop6h 33m
American Airlines
Fri 2/131:21 pm
FLG
-
STL
2 stops8h 37m
American Airlines
Deal found 1/25$426
This American Airlines deal was found by Cheapflights users on 1/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/197:58 am
STL
-
FLG
1 stop5h 53m
American Airlines
Sun 2/225:50 pm
FLG
-
STL
1 stop5h 09m
American Airlines
Deal found 1/24$456
This American Airlines deal was found by Cheapflights users on 1/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:08 am
STL
-
FLG
2 stops10h 29m
American Airlines
Sat 9/1212:15 pm
FLG
-
STL
2 stops9h 05m
American Airlines
Deal found 1/24$471
This American Airlines deal was found by Cheapflights users on 1/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/277:00 am
STL
-
FLG
1 stop6h 51m
American Airlines
Tue 3/3111:41 am
FLG
-
STL
1 stop5h 48m
American Airlines
Deal found 1/24$486
This American Airlines deal was found by Cheapflights users on 1/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/62:24 pm
STL
-
FLG
1 stop5h 20m
American Airlines
Fri 6/1212:17 pm
FLG
-
STL
1 stop5h 09m
American Airlines
Deal found 1/25$516
This American Airlines deal was found by Cheapflights users on 1/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/107:00 am
STL
-
FLG
1 stop6h 51m
American Airlines
Fri 3/204:50 pm
FLG
-
STL
2 stops14h 05m
American Airlines
Deal found 1/24$562

Find flight deals from St. Louis to Flagstaff

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Flagstaff (FLG). 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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$406
(American Airlines)

Popular in

March

Cheapest in

September

Average price

$620
Provider with most accurate pricing for Lambert-St Louis-Flagstaff Pulliam flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Flagstaff Pulliam flights.
Search Deals
From Lambert-St Louis to Flagstaff Pulliam
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($27 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Flagstaff 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 January 26, 2026.
Use the filters below to find and compare flights from St. Louis to Flagstaff that are best for you.

Fly from

St. Louis

Fly to

Flagstaff

Route

Depart

Return

Price

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Fri 3/6

7:58 am-12:51 pm

1 stop5h 53m

Flagstaff Pulliam

Tue 3/10

4:50 pm-11:59 pm

1 stop5h 09m

$406

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Mon 2/9

6:00 am-12:48 pm

1 stop7h 48m

Flagstaff Pulliam

Fri 2/13

5:50 pm-11:59 pm

1 stop5h 09m

$416

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Thu 2/19

7:58 am-12:51 pm

1 stop5h 53m

Flagstaff Pulliam

Sun 2/22

5:50 pm-11:59 pm

1 stop5h 09m

$456

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Fri 3/27

7:00 am-11:51 am

1 stop6h 51m

Flagstaff Pulliam

Tue 3/31

11:41 am-7:29 pm

1 stop5h 48m

$486

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Tue 3/10

7:00 am-11:51 am

1 stop6h 51m

Flagstaff Pulliam

Fri 3/20

4:50 pm-8:55 am

2 stops14h 05m

$562

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

Compare providers for flights from St. Louis to Flagstaff

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 St. Louis to Flagstaff in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 St. Louis-Flagstaff flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Flagstaff flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Flagstaff flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Flagstaff flights, Cheapflights users trust Expedia the most. Expedia 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 St. Louis-Flagstaff 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 St. Louis to Flagstaff

Have a flexible travel schedule? Discover the best time to fly to Flagstaff from St. Louis 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 St. Louis to Flagstaff

What is the cheapest month to book a flight from St. Louis to Flagstaff?

Currently, April is the cheapest month in which you can book a flight from St. Louis to Flagstaff (average of $349). Flying from St. Louis to Flagstaff in December is currently the most expensive (average of $525). 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.

Reviews of airlines servicing Flagstaff

Get insights into the airlines that provide service to Flagstaff. 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 Flagstaff. Reviews last updated January 26, 2026.
Read through reviews of airlines operating flights from St. Louis to Flagstaff, such as American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,189 reviews

Entertainment

6.9

Food

6.4

Overall

7.2

Boarding

7.5

Crew

8.0

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
American Airlines
7.2
Good
11,189 reviews
American Airlines
7.2
Good
11,189 reviews

Entertainment

6.9

Food

6.4

Overall

7.2

Boarding

7.5

Crew

8.0

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.

Related info for your journey

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

  • How long is the flight from St. Louis to Flagstaff?

    Departing from St. Louis to Flagstaff will take you 5h 53m. The distance from St. Louis to Flagstaff is about 1199 mi.

  • What is the cheapest airline to fly from St. Louis to Flagstaff round-trip?

    Our cheapest airline available from St. Louis to Flagstaff is American Airlines. Our recent data shows that you can find tickets from as low as $355 on this airline. Users have found that American Airlines is 36% cheaper than the other options available to this destination.

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

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

  • How can I find direct flights from St. Louis to Flagstaff?

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

  • Can I find deals for business class flights from St. Louis to Flagstaff?

    Yes. Cheapflights offers flight deals from St. Louis to Flagstaff 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 St. Louis to Flagstaff?

    Currently, April is the cheapest month in which you can book a flight from St. Louis to Flagstaff (average of $349). Flying from St. Louis to Flagstaff in December is currently the most expensive (average of $525). 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 Flagstaff?

Book flights to Flagstaff if you plan to visit one of these locations
Winslow
Williams

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Top airline flying from St. Louis to Flagstaff

Discover the top airline that operate flights from St. Louis to Flagstaff. 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 January 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$355Average$525FlexibilityNo cancel feeOn-time71%

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