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Flagstaff

$260+ 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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FLG
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$406
(American Airlines)

One-way from

$260
(American Airlines)

Popular in

January

Cheapest in

September

Average price

$445
From Lambert-St Louis to Flagstaff Pulliam
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One-way flight from Lambert-St Louis to Flagstaff Pulliam
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Highest demand for flights based on searches. 13% potential increase in price ($91 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/10. 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 10/176:21 pmSTL - FLG
1 stop6h 33mAmerican Airlines
Tue 10/211:20 pmFLG - STL
1 stop5h 07mAmerican Airlines
Deal found 9/10$406
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/58:00 amSTL - FLG
1 stop5h 25mAmerican Airlines
Tue 10/141:20 pmFLG - STL
1 stop5h 07mAmerican Airlines
Deal found 9/10$436
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/176:21 pmSTL - FLG
1 stop6h 33mAmerican Airlines
Mon 10/201:20 pmFLG - STL
2 stops8h 29mAmerican Airlines
Deal found 9/10$496
This American Airlines deal was found by Cheapflights users on 9/10. 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 12/237:00 amSTL - FLG
1 stop6h 00mAmerican Airlines
Sun 1/412:30 pmFLG - STL
1 stop5h 52mAmerican Airlines
Deal found 9/10$556
This American Airlines deal was found by Cheapflights users on 9/9. 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 10/26:18 pmSTL - FLG
1 stop6h 03mAmerican Airlines
Sun 10/55:24 pmFLG - STL
1 stop4h 35mAmerican Airlines
Deal found 9/9$566
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/166:21 pmSTL - FLG
1 stop6h 33mAmerican Airlines
Mon 10/201:20 pmFLG - STL
2 stops8h 29mAmerican Airlines
Deal found 9/10$626

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 September 11, 2025.
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

Mon 10/27

7:31 am-12:50 pm

1 stop7h 19m

Flagstaff Pulliam

Sat 11/1

11:20 am-8:53 pm

1 stop7h 33m

$406

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Fri 2/6

8:14 am-2:12 pm

1 stop6h 58m

Flagstaff Pulliam

Tue 2/10

2:15 pm-10:27 pm

1 stop7h 12m

$406

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Fri 10/17

6:21 pm-10:54 pm

1 stop6h 33m

Flagstaff Pulliam

Tue 10/21

1:20 pm-8:27 pm

1 stop5h 07m

$406

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Tue 3/10

8:05 am-1:18 pm

1 stop7h 13m

Flagstaff Pulliam

Wed 3/11

3:09 pm-11:47 pm

1 stop6h 38m

$436

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Sun 10/5

8:00 am-11:25 am

1 stop5h 25m

Flagstaff Pulliam

Tue 10/14

1:20 pm-8:27 pm

1 stop5h 07m

$436

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Sun 10/12

5:11 am-10:49 am

1 stop7h 38m

$260

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Wed 1/21

5:14 am-11:48 am

1 stop7h 34m

$260

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Thu 9/25

6:18 pm-10:21 pm

1 stop6h 03m

$340

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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 $496). Flying from St. Louis to Flagstaff in March is currently the most expensive (average of $655). 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 September 11, 2025.
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
10,000 reviews

Crew

8.0

Overall

7.2

Entertainment

6.9

Comfort

7.2

Food

6.4

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Crew

8.0

Overall

7.2

Entertainment

6.9

Comfort

7.2

Food

6.4

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

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 19m. 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 $435 on this airline. Users have found that American Airlines is 28% 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 $496). Flying from St. Louis to Flagstaff in March is currently the most expensive (average of $655). 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
Williams
Winslow

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$435Average$632FlexibilityNo cancel feeOn-time71%

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