STL - FLG

$260 Find Cheap Flights from St. Louis to Flagstaff

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Flagstaff departing on 10/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Flagstaff

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Flagstaff, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Flagstaff, as well as popular online travel agencies
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Flight Deals

Cheap Flights from St. Louis to Flagstaff (STL-FLG)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Flagstaff that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Flagstaff

Fri, Oct 17 - Tue, Oct 21
American Airlines Logo
6:21 pm - 10:54 pmSTL-FLG
6h 33m1 stop
American Airlines Logo
1:20 pm - 8:27 pmFLG-STL
5h 07m1 stop
$406American Airlines
Find Deal
Fri, Oct 17 - Tue, Oct 21
American Airlines Logo
6:21 pm - 10:54 pmSTL-FLG
6h 33m1 stop
American Airlines Logo
1:20 pm - 11:54 pmFLG-STL
8h 34m2 stops
$416American Airlines
Find Deal
Fri, Feb 6 - Tue, Feb 10
American Airlines Logo
11:58 am - 8:49 pmSTL-FLG
9h 51m2 stops
American Airlines Logo
1:08 pm - 10:27 pmFLG-STL
8h 19m2 stops
$421American Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
American Airlines Logo
7:17 am - 10:49 amSTL-FLG
5h 32m1 stop
American Airlines Logo
3:09 pm - 11:47 pmFLG-STL
6h 38m1 stop
$436American Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
American Airlines Logo
2:36 pm - 10:37 pmSTL-FLG
10h 01m2 stops
American Airlines Logo
3:09 pm - 11:47 pmFLG-STL
6h 38m1 stop
$446American Airlines
Find Deal
Fri, Oct 31 - Fri, Nov 7
American Airlines Logo
7:01 am - 10:49 amSTL-FLG
5h 48m1 stop
American Airlines Logo
4:04 pm - 11:51 pmFLG-STL
6h 47m1 stop
$487American Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
American Airlines Logo
2:36 pm - 10:37 pmSTL-FLG
10h 01m2 stops
American Airlines Logo
12:11 pm - 11:32 pmFLG-STL
9h 21m2 stops
$531American Airlines
Find Deal
Fri, Oct 17 - Mon, Oct 20
American Airlines Logo
6:21 pm - 10:54 pmSTL-FLG
6h 33m1 stop
American Airlines Logo
1:20 pm - 11:49 pmFLG-STL
8h 29m2 stops
$546American Airlines
Find Deal
Fri, Oct 31 - Fri, Nov 7
American Airlines Logo
7:01 am - 10:49 amSTL-FLG
5h 48m1 stop
American Airlines Logo
12:50 pm - 8:09 amFLG-STL
18h 19m2 stops
$561American Airlines
Find Deal
Fri, Oct 17 - Tue, Oct 21
American Airlines Logo
5:02 pm - 10:54 pmSTL-FLG
7h 52m2 stops
American Airlines Logo
1:20 pm - 11:54 pmFLG-STL
8h 34m2 stops
$571American Airlines
Find Deal

Everything you should know

When to travel
September
Cheapest • 29% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$406
Overall average: $717
American Airlines
Fri 10/17Tue 10/21
STL - FLG • 1 stop
Cheapest one-way
$260
American Airlines
Sun 10/12
STL - FLG • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Flagstaff!
Booking Insights

KAYAK's insights & trends for St. Louis to Flagstaff flights

Get data-powered insights and trends into flights from St. Louis to Flagstaff to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from St. Louis to Flagstaff?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Flagstaff, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Flagstaff is September, where tickets cost $435 (return) on average. On the other hand, the most expensive months are January and October, where the average cost of round-trip tickets is $808 and $717 respectively.

Find deals

Good to know

Low seasonJanuary
Cheapest flight$260
Best time to beat the crowds but there is an average 31% increase in price.
Most popular time to fly with an average 16% increase in price.
Flight from St. Louis to Flagstaff

When to book flights from St. Louis to Flagstaff

Are your dates flexible? Find out the best times to travel from St. Louis to Flagstaff based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Flagstaff

  • What is the cheapest flight from St. Louis to Flagstaff?

    In the last 3 days, the lowest price for a flight from St. Louis to Flagstaff was $260 for a one-way ticket and $406 for a round-trip.

  • Do I need a passport to fly between St. Louis and Flagstaff?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which aircraft models fly most regularly from St. Louis to Flagstaff?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Flagstaff?

    oneworld is the only airline alliance operating flights between St. Louis and Flagstaff.

  • How does KAYAK find such low prices on flights from St. Louis to Flagstaff?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Flagstaff.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Flagstaff?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Flagstaff from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Flagstaff?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Flagstaff with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and FLG can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Flagstaff?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Flagstaff from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from St. Louis to Flagstaff

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Flagstaff. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Flagstaff? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 10000 reviews
8.0Crew
6.9Entertainment
7.5Boarding
6.4Food
7.2Comfort
Airline reviews

As smooth as you can expect. Some issues with boarding because the previous plane took forever to deplane but overall, a good experience.

8.0 ExcellentKurt, Aug 2025PDX - PHX
Read more American Airlines reviews

As smooth as you can expect. Some issues with boarding because the previous plane took forever to deplane but overall, a good experience.

After a two hour delay, my flight was CANCELLED! No pilot available. Such BS.

I miss the screens they used to have for the long flights. I use a Kendal and it doesn’t work well with there WiFi. I tried my cell and the wifi was not good for it either this is the free wifi.

Update departure times in a more timely manner. We are not boarding on time if the plane isn’t arriving until after our scheduled departure time.

Took off on time and successfully avoided weather that looked to be a problem along the way

Very friendly and efficient and smooth boarding. We were even way early arriving at my destination. Thank you.

The trip was very smooth and they provided great customer service

We kept being told that the flight was full and that all overhead compartments were full and therefore had to check in our hand luggage. We were some of the last people to board and noticed that there was still sufficient space in the overhead compartments. We were obliged to check in hand luggage when there was space and so had to wait at luggage retrieval which took a while to then noticed damage to our luggage - not a great experience!

The flight was quick and to the point. The crew just did their job w/o excessive talking and everything was just perfect.

Two flight changes before the scheduled flight. On the day of the flight, the flight was delayed, which caused the connecting flight to be missed. Then, I was directed to another airport (CUN) and traveled to Tulum. American gave a $12 voucher for lunch. The least expensive item on the menu at a Mexican restaurant was $9.99. Driving to Tulum was a bad auto crash, and traffic was delayed two-plus hours. The bottom line is that we should have been at the hotel at noon, but it ended up at 11:30 PM.

Everything you need to know for your flight from St. Louis to Flagstaff

Information on your arrival and departure airports

St. Louis (STL)
Flagstaff (FLG)

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