STL - FLG

$436 Find Cheap Flights from St. Louis to Flagstaff

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Flagstaff departing on 7/15. 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

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Useful Info
Flights Deals

Cheap Flights from St. Louis to Flagstaff

 
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.

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

KAYAK's recommended round-trip deals from the most popular airlines that fly from St. Louis to Flagstaff.
Discover the best prices for you by selecting your travel dates on KAYAK.
American Airlines Logo
5:27 pm - 9:50 pmSTL-FLG
6h 23m1 stop
American Airlines Logo
7:00 am - 2:19 pmFLG-STL
5h 19m1 stop
$436American Airlines
Find Deal
Tue, Jul 15 - Sat, Jul 19
American Airlines Logo
2:18 pm - 5:53 pmSTL-FLG
5h 35m1 stop
American Airlines Logo
10:30 am - 9:26 pmFLG-STL
8h 56m2 stops
$446American Airlines
Find Deal
Thu, May 29 - Tue, Jun 3
American Airlines Logo
9:36 am - 5:53 pmSTL-FLG
10h 17m2 stops
American Airlines Logo
10:30 am - 9:52 pmFLG-STL
9h 22m2 stops
$451American Airlines
Find Deal
Thu, May 29 - Tue, Jun 3
American Airlines Logo
5:32 pm - 9:47 pmSTL-FLG
6h 15m1 stop
American Airlines Logo
8:15 am - 5:30 pmFLG-STL
7h 15m1 stop
$486American Airlines
Find Deal
Thu, Aug 14 - Mon, Aug 18
American Airlines Logo
2:18 pm - 5:53 pmSTL-FLG
5h 35m1 stop
American Airlines Logo
10:30 am - 11:58 pmFLG-STL
11h 28m1 stop
$489American Airlines
Find Deal
Thu, May 29 - Tue, Jun 3
American Airlines Logo
9:23 am - 5:37 pmSTL-FLG
10h 14m2 stops
American Airlines Logo
7:00 am - 4:51 pmFLG-STL
7h 51m1 stop
$496American Airlines
Find Deal
Thu, Aug 14 - Mon, Aug 18
American Airlines Logo
9:23 am - 5:37 pmSTL-FLG
10h 14m2 stops
American Airlines Logo
8:15 am - 8:23 pmFLG-STL
10h 08m2 stops
$501American Airlines
Find Deal
Thu, Aug 14 - Mon, Aug 18
American Airlines Logo
5:28 am - 11:03 amSTL-FLG
7h 35m1 stop
American Airlines Logo
10:15 am - 8:23 pmFLG-STL
8h 08m2 stops
$506American Airlines
Find Deal
Fri, Oct 17 - Tue, Oct 21
American Airlines Logo
3:58 pm - 7:50 pmSTL-FLG
5h 52m1 stop
American Airlines Logo
6:10 pm - 9:02 amFLG-STL
12h 52m2 stops
$527American Airlines
Find Deal
Fri, May 30 - Fri, Jun 6
American Airlines Logo
4:52 pm - 10:45 pmSTL-FLG
7h 53m2 stops
American Airlines Logo
6:10 pm - 9:02 amFLG-STL
12h 52m2 stops
$532American Airlines
Find Deal
Fri, May 30 - Fri, Jun 6
Useful Info

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 $503 (return) on average. On the other hand, the most expensive months are January and March, where the average cost of round-trip tickets is $808 and $714 respectively.

Find deals

Good to know

Low seasonJanuary
High seasonMarch
Cheapest flight$436
Best time to beat the crowds but there is an average 26% increase in price.
Most popular time to fly with an average 12% 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 $436 for a round-trip ticket.

  • 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.

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
7.5Boarding
7.2Comfort
6.5Food
6.9Entertainment
8.0Crew
Airline reviews

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

10.0 ExcellentStephen, Apr 2025DFW - TUS
Read more American Airlines reviews

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.

The seats were crammed and the guy in front of me wouldn't stop reclining. If AA is cramming extra rows in, they need to take away the reclining in coach. My knees were smashed for 4 1/2 hours and I was very close to confronting the passenger in front of me.

What, first class and not even a cup of coffee before landing at 5 am in First Class? Really?

Miami lounges were overcrowded and we were unable to get in. We only had a short time. But the banks are too tight in all American hubs

I paid for what I got which was cheap, I brought my own entertainment. I knew what to expect, so I could be prepared. If you’re flying economy, check in early like me. I have no problems with my flight, was on time, staff were friendly, and overall good experience.

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

Information on your arrival and departure airports

Flagstaff (FLG)
St. Louis (STL)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.