STL - FLG

$210 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 3/2. 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

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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Everything you should know

Cheapest round-trip
$366
Overall average: $485
American Airlines
Tue 4/7Fri 4/10
STL - FLG • 1 stop
Cheapest one-way
$210
American Airlines
Mon 3/2
STL - FLG • 1 stop
When to travel
September
Cheapest • 22% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+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

Tue, Apr 7 - Fri, Apr 10
American Airlines Logo
2:37 pm - 6:44 pm
STL
-
FLG
6h 07m
1 stop
American Airlines Logo
7:52 pm - 8:54 am
FLG
-
STL
11h 02m
2 stops
$366American Airlines
Tue, Apr 7 - Fri, Apr 10
American Airlines Logo
12:25 pm - 6:44 pm
STL
-
FLG
8h 19m
2 stops
American Airlines Logo
7:52 pm - 8:54 am
FLG
-
STL
11h 02m
2 stops
$371American Airlines
Wed, Mar 25 - Wed, Apr 1
American Airlines Logo
5:12 am - 11:51 am
STL
-
FLG
8h 39m
1 stop
American Airlines Logo
4:50 pm - 11:59 pm
FLG
-
STL
5h 09m
1 stop
$406American Airlines
Fri, Feb 27 - Tue, Mar 3
American Airlines Logo
4:13 pm - 11:59 pm
STL
-
FLG
8h 46m
2 stops
American Airlines Logo
5:50 pm - 11:59 pm
FLG
-
STL
5h 09m
1 stop
$416American Airlines
Fri, Feb 27 - Tue, Mar 3
American Airlines Logo
1:34 pm - 11:59 pm
STL
-
FLG
11h 25m
2 stops
American Airlines Logo
1:21 pm - 11:22 pm
FLG
-
STL
9h 01m
2 stops
$421American Airlines
Sun, Feb 22 - Thu, Feb 26
American Airlines Logo
5:12 am - 12:11 pm
STL
-
FLG
7h 59m
1 stop
American Airlines Logo
12:41 pm - 7:29 pm
FLG
-
STL
5h 48m
1 stop
$436American Airlines
Tue, Mar 10 - Thu, Mar 12
American Airlines Logo
4:13 pm - 11:07 pm
STL
-
FLG
8h 54m
2 stops
American Airlines Logo
4:50 pm - 11:59 pm
FLG
-
STL
5h 09m
1 stop
$446American Airlines
Sat, Mar 7 - Tue, Mar 10
American Airlines Logo
11:46 am - 8:56 pm
STL
-
FLG
10h 10m
2 stops
American Airlines Logo
12:21 pm - 11:22 pm
FLG
-
STL
9h 01m
2 stops
$451American Airlines
Wed, Mar 4 - Tue, Mar 10
American Airlines Logo
5:12 am - 12:11 pm
STL
-
FLG
7h 59m
1 stop
American Airlines Logo
4:50 pm - 11:59 pm
FLG
-
STL
5h 09m
1 stop
$486American Airlines
Wed, Mar 4 - Thu, Mar 12
American Airlines Logo
4:13 pm - 11:59 pm
STL
-
FLG
8h 46m
2 stops
American Airlines Logo
4:50 pm - 11:59 pm
FLG
-
STL
5h 09m
1 stop
$496American 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 September, where tickets cost $440 (return) on average. On the other hand, the most expensive months are March and January, where the average cost of round-trip tickets is $695 and $620 respectively.

Find deals

Good to know

Low seasonDecember
Cheapest flight$210
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly with an average 23% 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 $210 for a one-way ticket and $366 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 11216 reviews
6.4Food
7.2Comfort
8.0Crew
7.5Boarding
6.9Entertainment
Airline reviews

It would be nice to have some low carb options in the snacks.

10.0 ExcellentLori, Jan 2026
SMF - PHX
Read more American Airlines reviews

It would be nice to have some low carb options in the snacks.

The plane was experiencing problems with the HVAC system, it was very cold in the front of the plane and very hot in the back.

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

I love American. I’ll never fly anyone else if I can help it.

The flight was on time and arrived early. The crew were friendly and helpful.

Overall experience was great. Flights were almost on time in departing and we arrived at our destination as scheduled. No issues with amenities or flight crew. Everything went well as as expected. Will fly again with American Airlines in the future!

Boarding was organized and timely. Food was mediocre, especially for first class travel.

I bought wifi and most of the flight could not even use it my apps would just spin. I couldn't even listen to music. super frustrating.

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)