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

Departing from St. Louis to Flagstaff will take you 18h 49m. 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 41% cheaper than the other options available to this destination.

In terms of precipitation, rainfall in Flagstaff ranges from 0.4 - 2.7 inches per month. August is typically the wettest month, when rainfall can reach 2.7 in. June is typically the driest time to visit Flagstaff when rainfall is around 0.4 in.

If weather is an important factor for your trip to Flagstaff, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Flagstaff as you normally would.

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.

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.

$357+ Cheap Flights from St. Louis to Flagstaff

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from St. Louis to Flagstaff with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from St. Louis to Flagstaff

Cheapest

Best

Last-minute

One-way

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 October 24, 2026.

Tue 10/202:31 pm -

1 stop8h 08m

Tue 10/276:15 am -

1 stop5h 22m

Deal found 10/19

$581

Fri 12/257:35 am -

1 stop5h 38m

Fri 1/16:43 am -

1 stop6h 16m

Deal found 10/21

$600

Tue 12/296:57 pm -

1 stop18h 49m

Fri 1/16:43 am -

1 stop6h 16m

Deal found 10/23

$673

Sun 10/2511:32 am -

2 stops11h 51m

Sun 11/16:00 am -

1 stop5h 28m

Deal found 10/24

$796

Sat 12/266:57 pm -

1 stop18h 49m

Fri 1/16:43 am -

1 stop6h 16m

Deal found 10/21

$865

Best flights from St. Louis to Flagstaff
Discover carefully curated flight deals from St. Louis to Flagstaff that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 24, 2026.

Tue 12/296:57 pm -

1 stop18h 49m

Fri 1/16:43 am -

1 stop6h 16m

Deal found 10/23

$673

Fri 12/2510:20 am -

2 stops25h 39m

Fri 1/16:43 am -

2 stops10h 24m

Deal found 10/21

$854

Sun 12/275:00 am -

1 stop8h 46m

Wed 12/306:43 am -

1 stop6h 16m

Deal found 10/24

$941

Sat 12/266:57 pm -

1 stop18h 49m

Fri 1/16:43 am -

2 stops10h 24m

Deal found 10/21

$972

Find flight deals from St. Louis to Flagstaff

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$600 (American Airlines)
One-way from	$357 (American Airlines)
Popular in	June
Cheapest in	March
Average price	$658

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. 7% potential increase in price ($45 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Cheapflights Fare Finder

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 Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

Tue 1/5

2:45 pm-12:12 pm

1 stop22h 27m

Flagstaff Pulliam

Wed 12/31

12:00 am-1:00 am

Nonstop0h 00m

$357

Quickest round-trip

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

Sun 11/1

6:00 am-12:50 pm

1 stop7h 50m

Flagstaff Pulliam

Wed 12/31

12:00 am-1:00 am

Nonstop0h 00m

$422

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

Tue 12/29

6:57 pm-12:46 pm

1 stop18h 49m

Flagstaff Pulliam

Fri 1/1

6:43 am-1:59 pm

1 stop6h 16m

$673

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

Fri 12/25

10:20 am-10:59 am

2 stops25h 39m

Flagstaff Pulliam

Fri 1/1

6:43 am-6:07 pm

2 stops10h 24m

$854

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

Sun 12/27

5:00 am-12:46 pm

1 stop8h 46m

Flagstaff Pulliam

Wed 12/30

6:43 am-1:59 pm

1 stop6h 16m

$941

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

Sat 12/26

6:57 pm-12:46 pm

1 stop18h 49m

Flagstaff Pulliam

Fri 1/1

6:43 am-6:07 pm

2 stops10h 24m

$972

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Sorted by cheapest first

Compare providers for flights from St. Louis to Flagstaff

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 October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust 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.

STL-FLG

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, March is the cheapest month in which you can book a flight from St. Louis to Flagstaff (average of $485). Flying from St. Louis to Flagstaff in June is currently the most expensive (average of $762). 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

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

7.0

Good

12,193 reviews

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

7.0

Good

12,193 reviews

American Airlines

7.0

Good

12,193 reviews

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

How long is the flight from St. Louis to Flagstaff?
Departing from St. Louis to Flagstaff will take you 18h 49m. 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 41% 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, March is the cheapest month in which you can book a flight from St. Louis to Flagstaff (average of $485). Flying from St. Louis to Flagstaff in June is currently the most expensive (average of $762). 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

Williams

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Flights by cabin class

Other flight options

Other flights from St. Louis

Popular flights

Alternative routes for St. Louis to Flagstaff

St. Louis to Las Vegas flights

Kansas City to Las Vegas flights

Kansas City to Sky Harbor Intl flights

St. Louis to Sky Harbor Intl flights

Springfield to Las Vegas flights

Springfield to Sky Harbor Intl flights

Columbia to Las Vegas flights

Kansas City to Tucson flights

Columbia to Sky Harbor Intl flights

St. Louis to Tucson flights

Springfield to Tucson flights

Joplin to Las Vegas flights

St. Louis to Yuma flights

Quincy to Las Vegas flights

Cape Girardeau to Las Vegas flights

Springfield to Flagstaff flights

Kansas City to Flagstaff flights

Cape Girardeau to Sky Harbor Intl flights

Top airline flying from St. Louis to Flagstaff

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$355	Average$565	FlexibilityNo cancel fee	On-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$357+ 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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Flagstaff with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Flagstaff

Cheapest flights from St. Louis to FlagstaffExplore 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 October 24, 2026.

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 October 24, 2026.

Best flights from St. Louis to FlagstaffDiscover carefully curated flight deals from St. Louis to Flagstaff that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 24, 2026.

Discover carefully curated flight deals from St. Louis to Flagstaff that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 24, 2026.

Last-minute flights from St. Louis to FlagstaffDiscover last-minute flight deals from St. Louis to Flagstaff. Data last updated October 24, 2026 and is based on user searches.

Discover last-minute flight deals from St. Louis to Flagstaff. Data last updated October 24, 2026 and is based on user searches.

One-way flights from St. Louis to FlagstaffSearch for one-way flight options from St. Louis to Flagstaff. Find affordable one-way fares based on user searches. Data last updated October 24, 2026.

Search for one-way flight options from St. Louis to Flagstaff. Find affordable one-way fares based on user searches. Data last updated October 24, 2026.

Find flight deals from St. Louis to Flagstaff

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Flagstaff that are best for you.

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 October.

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.

Cheapflights Insights

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

Reviews of airlines servicing Flagstaff

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.

Related info for your journey

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

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

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

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

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

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

Traveling to a place near Flagstaff?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Flagstaff

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Flagstaff by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from St. Louis to Flagstaff by cabin class

Find flights from St. Louis to Flagstaff, based on your preferred cabin class, be it economy, premium economy, business, or first class.

St. Louis and Flagstaff flights

Browse other St. Louis and Flagstaff flight options. Last updated on October 24, 2026.

Other flights from St. Louis

Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on October 24, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

Top airline flying from St. Louis to Flagstaff

100% Free

Book with Flexibility

Travel Smart

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 October 24, 2026.

Best flights from St. Louis to Flagstaff
Discover carefully curated flight deals from St. Louis to Flagstaff that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 24, 2026.

Last-minute flights from St. Louis to Flagstaff
Discover last-minute flight deals from St. Louis to Flagstaff. Data last updated October 24, 2026 and is based on user searches.

One-way flights from St. Louis to Flagstaff
Search for one-way flight options from St. Louis to Flagstaff. Find affordable one-way fares based on user searches. Data last updated October 24, 2026.