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Flagstaff

$385+ Cheap flights from St. Louis to Flagstaff (STL - FLG)

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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FLG
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
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 July 25, 2026.

This American Airlines deal was found by Cheapflights users on 7/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/212:23 pm
STL
-
FLG
1 stop5h 11m
American Airlines
Tue 11/241:22 pm
FLG
-
STL
1 stop5h 55m
American Airlines
Deal found 7/21$508
This American Airlines deal was found by Cheapflights users on 7/23. 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.
Wed 8/268:36 am
STL
-
FLG
1 stop5h 18m
American Airlines
Sun 8/307:00 am
FLG
-
STL
1 stop4h 39m
American Airlines
Deal found 7/23$522
This American Airlines deal was found by Cheapflights users on 7/22. 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.
Wed 8/58:36 am
STL
-
FLG
1 stop5h 18m
American Airlines
Sat 8/812:35 pm
FLG
-
STL
1 stop5h 51m
American Airlines
Deal found 7/22$542
This American Airlines deal was found by Cheapflights users on 7/22. 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 8/216:36 am
STL
-
FLG
1 stop7h 18m
American Airlines
Sun 8/2311:42 am
FLG
-
STL
1 stop6h 54m
American Airlines
Deal found 7/22$550
This American Airlines deal was found by Cheapflights users on 7/23. 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 10/95:40 am
STL
-
FLG
1 stop8h 25m
American Airlines
Fri 10/1612:45 pm
FLG
-
STL
1 stop7h 14m
American Airlines
Deal found 7/23$560
This American Airlines deal was found by Cheapflights users on 7/23. 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 8/258:00 am
STL
-
FLG
1 stop5h 11m
American Airlines
Tue 9/112:35 pm
FLG
-
STL
1 stop5h 51m
American Airlines
Deal found 7/23$574
This American Airlines deal was found by Cheapflights users on 7/22. 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.
Wed 8/58:00 am
STL
-
FLG
1 stop5h 11m
American Airlines
Sun 8/911:42 am
FLG
-
STL
1 stop6h 54m
American Airlines
Deal found 7/22$577
This American Airlines deal was found by Cheapflights users on 7/24. 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 8/216:36 am
STL
-
FLG
1 stop7h 18m
American Airlines
Fri 8/2812:35 pm
FLG
-
STL
1 stop5h 08m
American Airlines
Deal found 7/24$591
This American Airlines deal was found by Cheapflights users on 7/23. 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.
Sun 8/238:00 am
STL
-
FLG
1 stop5h 11m
American Airlines
Wed 9/212:35 pm
FLG
-
STL
1 stop5h 51m
American Airlines
Deal found 7/23$612
This American Airlines deal was found by Cheapflights users on 7/23. 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 8/298:00 am
STL
-
FLG
1 stop7h 20m
American Airlines
Sun 8/3011:42 am
FLG
-
STL
2 stops10h 00m
American Airlines
Deal found 7/23$629

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 July 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$508
(American Airlines)

One-way from

$385
(American Airlines)

Popular in

December

Cheapest in

August

Average price

$611
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
One-way flight from Lambert-St Louis to Flagstaff Pulliam
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($71 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 25, 2026.
Use the filters below to find and compare flights from St. Louis to Flagstaff that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Fri 8/21

6:36 am-11:54 am

1 stop7h 18m

Flagstaff Pulliam

Sun 8/23

11:42 am-8:36 pm

1 stop6h 54m

$550

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Thu 9/17

8:30 am-11:53 am

1 stop5h 23m

Flagstaff Pulliam

Thu 9/24

12:37 pm-9:57 pm

1 stop7h 20m

$550

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Fri 10/9

5:40 am-12:05 pm

1 stop8h 25m

Flagstaff Pulliam

Fri 10/16

12:45 pm-9:59 pm

1 stop7h 14m

$560

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Wed 8/26

6:00 am-5:49 pm

2 stops13h 49m

Flagstaff Pulliam

Sun 8/30

7:00 am-1:39 pm

1 stop4h 39m

$577

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Wed 8/5

8:00 am-11:11 am

1 stop5h 11m

Flagstaff Pulliam

Sun 8/9

11:42 am-8:36 pm

1 stop6h 54m

$577

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Wed 8/5

8:36 am-5:49 pm

2 stops11h 13m

Flagstaff Pulliam

Sat 8/8

12:35 pm-8:26 pm

1 stop5h 51m

$582

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Fri 8/21

6:36 am-11:54 am

1 stop7h 18m

Flagstaff Pulliam

Fri 8/28

12:35 pm-7:43 pm

1 stop5h 08m

$591
Quickest round-trip

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Sun 8/23

8:00 am-11:11 am

1 stop5h 11m

Flagstaff Pulliam

Wed 9/2

12:35 pm-8:26 pm

1 stop5h 51m

$612

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Thu 8/27

6:36 am-11:54 am

1 stop7h 18m

Flagstaff Pulliam

Tue 9/1

12:35 pm-8:26 pm

1 stop5h 51m

$612

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Fri 8/28

10:22 am-6:20 pm

2 stops9h 58m

Flagstaff Pulliam

Tue 9/1

12:35 pm-8:26 pm

1 stop5h 51m

$635

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 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 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 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, August is the cheapest month in which you can book a flight from St. Louis to Flagstaff (average of $473). Flying from St. Louis to Flagstaff in December is currently the most expensive (average of $791). 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.

How much does it cost to fly round-trip from St. Louis to Flagstaff?

Airfare is below average for this route at the moment.

St. Louis to Flagstaff flights typically cost between $520 and $622 in November.
The cheapest round-trip price found within the last 5 days was $508 on American Airlines (Nov 21-Nov 24).

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 July 25, 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
7.1
Good
11,847 reviews

Food

6.4

Entertainment

6.8

Boarding

7.5

Crew

7.9

Comfort

7.2

Overall

7.1

Reviews

1 / 20
6.0
Good

Kristin,Jul 2026

DCA - PHX

We got delayed because of filling up more gas then a storm hit after that so we sat in the plane for 1.5 hours more. It was hot while we waited.
American Airlines
7.1
Good
11,847 reviews
American Airlines
7.1
Good
11,847 reviews

Food

6.4

Entertainment

6.8

Boarding

7.5

Crew

7.9

Comfort

7.2

Overall

7.1

Reviews

1 / 20
6.0
Good

Kristin,Jul 2026

DCA - PHX

We got delayed because of filling up more gas then a storm hit after that so we sat in the plane for 1.5 hours more. It was hot while we waited.

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 7h 18m. 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 40% 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, August is the cheapest month in which you can book a flight from St. Louis to Flagstaff (average of $473). Flying from St. Louis to Flagstaff in December is currently the most expensive (average of $791). 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 July 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$355Average$559FlexibilityNo cancel feeOn-time71%

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