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Cheap flights from St. Louis to Flagstaff from $385

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Flagstaff departing on 9/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Flagstaff

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
8:00 am - 11:11 am
STL
-
FLG
5h 11m
1 stop
American Airlines Logo
12:35 pm - 8:26 pm
FLG
-
STL
5h 51m
1 stop
$474American Airlines
Tue, Aug 11 - Sat, Aug 15
American Airlines Logo
8:01 am - 11:08 am
STL
-
FLG
5h 07m
1 stop
American Airlines Logo
12:37 pm - 7:53 pm
FLG
-
STL
5h 16m
1 stop
$508American Airlines
Tue, Jul 14 - Tue, Jul 21
American Airlines Logo
8:36 am - 11:54 am
STL
-
FLG
5h 18m
1 stop
American Airlines Logo
12:36 pm - 7:46 pm
FLG
-
STL
5h 10m
1 stop
$512American Airlines
Tue, Aug 11 - Mon, Oct 19
American Airlines Logo
8:30 am - 11:59 am
STL
-
FLG
5h 29m
1 stop
American Airlines Logo
7:00 am - 2:45 pm
FLG
-
STL
5h 45m
1 stop
$543American Airlines
Wed, Oct 21 - Mon, Oct 26
American Airlines Logo
10:22 am - 5:49 pm
STL
-
FLG
9h 27m
2 stops
American Airlines Logo
10:30 am - 5:37 pm
FLG
-
STL
5h 07m
1 stop
$548American Airlines
Tue, Aug 11 - Sat, Aug 15
American Airlines Logo
7:07 am - 11:57 am
STL
-
FLG
6h 50m
1 stop
American Airlines Logo
12:37 pm - 9:48 pm
FLG
-
STL
7h 11m
1 stop
$550American Airlines
Fri, Jul 17 - Fri, Jul 24
American Airlines Logo
8:01 am - 11:08 am
STL
-
FLG
5h 07m
1 stop
American Airlines Logo
6:50 am - 1:53 pm
FLG
-
STL
5h 03m
1 stop
$577American Airlines
Sun, Jul 5 - Sat, Jul 11
American Airlines Logo
8:01 am - 1:20 pm
STL
-
FLG
7h 19m
1 stop
American Airlines Logo
12:37 pm - 9:48 pm
FLG
-
STL
7h 11m
1 stop
$581American Airlines
Thu, Jul 16 - Thu, Jul 23
American Airlines Logo
8:34 am - 5:49 pm
STL
-
FLG
11h 15m
2 stops
American Airlines Logo
12:36 pm - 7:46 pm
FLG
-
STL
5h 10m
1 stop
$586American Airlines
Tue, Aug 11 - Mon, Oct 19
American Airlines Logo
2:38 pm - 8:04 pm
STL
-
FLG
7h 26m
1 stop
American Airlines Logo
12:37 pm - 7:53 pm
FLG
-
STL
5h 16m
1 stop
$612American Airlines
Thu, Jul 2 - Mon, Jul 6

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American Airlines flights from St. Louis to Flagstaff

Our best American Airlines deals on St. Louis to Flagstaff flight tickets
American Airlines
Aug 11
STL8:00 amLambert-St Louis
5h 11m
1 stop
FLG11:11 amFlagstaff Pulliam
Aug 15
FLG12:35 pmFlagstaff Pulliam
5h 51m
1 stop
STL8:26 pmLambert-St Louis
$474
American Airlines
Jul 14
STL8:01 amLambert-St Louis
5h 07m
1 stop
FLG11:08 amFlagstaff Pulliam
Jul 21
FLG12:37 pmFlagstaff Pulliam
5h 16m
1 stop
STL7:53 pmLambert-St Louis
$508
American Airlines
Aug 11
STL8:36 amLambert-St Louis
5h 18m
1 stop
FLG11:54 amFlagstaff Pulliam
Oct 19
FLG12:36 pmFlagstaff Pulliam
5h 10m
1 stop
STL7:46 pmLambert-St Louis
$512

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Flagstaff that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated June 20, 2026.
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 - FLG

STLFLG

Lambert-St Louis

Tue 8/11

8:00 am-11:11 am

1 stop5h 11m

Flagstaff Pulliam

Sat 8/15

12:35 pm-8:26 pm

1 stop5h 51m

$474

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Tue 7/14

8:01 am-11:08 am

1 stop5h 07m

Flagstaff Pulliam

Tue 7/21

12:37 pm-7:53 pm

1 stop5h 16m

$508

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Tue 8/11

8:36 am-11:54 am

1 stop5h 18m

Flagstaff Pulliam

Mon 10/19

12:36 pm-7:46 pm

1 stop5h 10m

$512

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Wed 10/21

8:30 am-11:59 am

1 stop5h 29m

Flagstaff Pulliam

Mon 10/26

7:00 am-2:45 pm

1 stop5h 45m

$543

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Tue 8/11

10:22 am-5:49 pm

2 stops9h 27m

Flagstaff Pulliam

Sat 8/15

10:30 am-5:37 pm

1 stop5h 07m

$548

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Fri 7/17

7:07 am-11:57 am

1 stop6h 50m

Flagstaff Pulliam

Fri 7/24

12:37 pm-9:48 pm

1 stop7h 11m

$550
Quickest round-trip

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Sun 7/5

8:01 am-11:08 am

1 stop5h 07m

Flagstaff Pulliam

Sat 7/11

6:50 am-1:53 pm

1 stop5h 03m

$577

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Thu 7/16

8:01 am-1:20 pm

1 stop7h 19m

Flagstaff Pulliam

Thu 7/23

12:37 pm-9:48 pm

1 stop7h 11m

$581

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Tue 8/11

8:34 am-5:49 pm

2 stops11h 15m

Flagstaff Pulliam

Mon 10/19

12:36 pm-7:46 pm

1 stop5h 10m

$586

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Thu 7/2

2:38 pm-8:04 pm

1 stop7h 26m

Flagstaff Pulliam

Mon 7/6

12:37 pm-7:53 pm

1 stop5h 16m

$612

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

See travel insights to Flagstaff from

How to get the cheapest flight ticket from St. Louis to Flagstaff

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Flagstaff?

The month of August is, on average, the cheapest month to fly to Flagstaff from St. Louis, with most prices found around $465. The month of September is another great option to travel to Flagstaff, with average flight prices from St. Louis averaging around $501.

Can stopping save me money on St. Louis to Flagstaff flights?

You could potentially save up to 9% on your flight if you consider stops on a St. Louis to Flagstaff flight.

When to book flights from St. Louis to Flagstaff

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Flagstaff according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Flagstaff (STL to FLG) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Flagstaff

Fastest flight time

5h 07m

Direct flights

None
The fastest flight from St. Louis to Flagstaff takes 5h 07m
There are no direct flights from St. Louis to Flagstaff. There are no popular flight routes from St. Louis to Flagstaff.
Search flight deals

Frequently asked questions about flying from St. Louis to Flagstaff

  • How far is Lambert-St Louis to Flagstaff Pulliam by plane?

    A flight from Lambert-St Louis to Flagstaff Pulliam will travel around 1204.8 mi. Typically, this will take 5h 07m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Flagstaff Pulliam Airport?

    Prices for flights from Lambert-St Louis Airport to Flagstaff Pulliam Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Flagstaff Pulliam Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Flagstaff Pulliam Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Flagstaff Pulliam Airport.

  • What documentation or ID do you need to fly to Flagstaff Pulliam Airport?

    The travel and health documents you'll need for your trip to Flagstaff Pulliam Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Flagstaff Pulliam Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Flagstaff?

Best airlines flying from St. Louis to Flagstaff

Compare and see reviews for airlines that fly from St. Louis to Flagstaff with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $355Free CancellationRating
7.1
11,715 reviews
Search American Airlines flights

Traveling to a place near Flagstaff?

Book flights to Flagstaff if you plan to visit one of these locations
Sedona
Williams
Winslow

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Flagstaff?

Finding the right flight to Flagstaff from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Flagstaff quick and easy, saving you time and money.

Can I find flights from St. Louis to Flagstaff with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Flagstaff from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Flagstaff?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Flagstaff.

I’m not ready to book a flight from St. Louis to Flagstaff right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Flagstaff, momondo offers a useful price alert feature which will track prices for flights to Flagstaff from St. Louis and alert you when they change.

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