STL - FLG

$385 Find Cheap Flights from St. Louis to Flagstaff - Compare and Save

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 10/13. 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, 0 bags

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Everything you should know

Cheapest round-trip
$550
Typical prices: $454-$630
American Airlines
Sun 9/27Sun 10/4
STL - FLG • 1 stop
Cheapest one-way
$385
American Airlines
Tue 10/13
STL - FLG • 1 stop
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Flagstaff. You'll need at least 1 connection.
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Top layover airports
Cheapest • Avg $349 (round-trip)
Shortest trip • 5h 29m (one-way)
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When to travel
Cheapest • 100% price drop
Most popular
Good to know
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+1
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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!
Flight Deals
Booking Insights
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

Sun, Sep 27 - Sun, Oct 4
American Airlines Logo
7:00 am - 11:53 am
STL
-
FLG
6h 53m
1 stop
American Airlines Logo
12:37 pm - 7:45 pm
FLG
-
STL
5h 08m
1 stop
$550American Airlines
Thu, Nov 5 - Sun, Nov 8
American Airlines Logo
2:29 pm - 6:35 pm
STL
-
FLG
5h 06m
1 stop
American Airlines Logo
4:04 pm - 11:50 pm
FLG
-
STL
6h 46m
1 stop
$570American Airlines
Thu, Nov 19 - Wed, Nov 25
American Airlines Logo
2:29 pm - 6:35 pm
STL
-
FLG
5h 06m
1 stop
American Airlines Logo
12:21 pm - 11:58 pm
FLG
-
STL
10h 37m
2 stops
$586American Airlines
Thu, Oct 1 - Fri, Oct 9
American Airlines Logo
8:30 am - 11:53 am
STL
-
FLG
5h 23m
1 stop
American Airlines Logo
6:30 am - 1:49 pm
FLG
-
STL
5h 19m
1 stop
$631American Airlines
Thu, Nov 19 - Wed, Nov 25
American Airlines Logo
2:08 pm - 11:43 pm
STL
-
FLG
10h 35m
2 stops
American Airlines Logo
12:21 pm - 12:05 am
FLG
-
STL
10h 44m
2 stops
$676American Airlines
Sun, Sep 27 - Sun, Oct 4
American Airlines Logo
5:43 am - 11:13 am
STL
-
FLG
7h 30m
2 stops
American Airlines Logo
12:37 pm - 7:45 pm
FLG
-
STL
5h 08m
1 stop
$692American Airlines
Thu, Nov 19 - Wed, Nov 25
American Airlines Logo
2:29 pm - 6:35 pm
STL
-
FLG
5h 06m
1 stop
American Airlines Logo
1:00 pm - 7:30 pm
FLG
-
STL
5h 30m
1 stop
$711American Airlines
Thu, Nov 5 - Sun, Nov 8
American Airlines Logo
9:12 am - 6:35 pm
STL
-
FLG
10h 23m
2 stops
American Airlines Logo
4:04 pm - 11:50 pm
FLG
-
STL
6h 46m
1 stop
$745American Airlines
Mon, Aug 3 - Fri, Aug 7
American Airlines Logo
8:01 am - 7:59 pm
STL
-
FLG
13h 58m
1 stop
American Airlines Logo
12:35 pm - 9:24 am
FLG
-
STL
18h 49m
1 stop
$762American Airlines
Sun, Sep 27 - Sun, Oct 4
American Airlines Logo
5:43 am - 11:13 am
STL
-
FLG
7h 30m
2 stops
American Airlines Logo
11:43 am - 11:43 pm
FLG
-
STL
10h 00m
2 stops
$807American Airlines
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 July, where tickets cost $0 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $791 and $762 respectively.

Good to know

Low seasonAugust
Cheapest flight$385
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly and prices are also 18% lower on average.
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 5 days, the lowest price for a flight from St. Louis to Flagstaff was $570 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.

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.
7.1
American AirlinesOverall score based on 11782 reviews
7.2Comfort
6.8Entertainment
7.9Crew
6.4Food
7.5Boarding
Airline reviews

My luggage was not sent with us. Not sure if this is Envoy Air responsibility but that was a very BAD experience

8.0 ExcellentJoseph, Jul 2026
STL - ORD
Read more American Airlines reviews

My luggage was not sent with us. Not sure if this is Envoy Air responsibility but that was a very BAD experience

Movies on my phone are great. It would be nice to have a gluten free snack option.

American delayed the flight for a crew rest period. The delay occurred late in the evening - the earliest i can find is 10:20 pm. With a 6 am flight anyone on the flight would have already have been asleep (unless you are insane, a vampire or on drugs) and at least for me i was already on the way to the airport at 445 am the next morning when i discovered they delayed the flight until 9 am. Given the incoming flight was in the air at 6 pm the evening before this should have been figured out a lot more timely that was there only crew to use. Just frustrating given there is no consideration for customer experience anymore in flying.

Good crew and flight was on time. It’s a small plane with limited overhead luggage space. They said the overhead space was full and I had to check my bag. There was still space when I got on. Waiting for my checked luggage added 30 minutes to my trip. Not the end of the world but also not great.

Trip delayed for 2 hours because of rain. We boarded and have to get down the flight and reboard again.

No enough space plus only allowing one laggage instead of two like other airlines.

Qatar airways ,boarding arrangements at Hamid international airport could been better

Liked that it was on time. Staff professional and friendly.

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.

American Airlines continues to price it can provide the least comfortable passenger experience in the air. This legacy carrier rivals the budgets for both terrible seats and inadequate amenities. I am a 5’7” woman who is not wider than a coach seat (even on these narrow bodied aircraft). My 3.5 hour flight was terribly uncomfortable because the leg room is inadequate (my knees hit the seat on front of me even when it was not reclined); the seat barely reclines; and the foam padding is worn thin to the extent one can feel the metal supports of the seat. Add to this the fact that the aisle is super narrow, so that the drink cart literally scrapes the arm rest of the aisle seat. It’s basically torture.

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

Information on your arrival and departure airports