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Cheap flights from St. Louis to Flagstaff from $397

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 7/10. 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

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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
7:12 am - 11:55 am
STL
-
FLG
6h 43m
1 stop
American Airlines Logo
5:01 pm - 12:12 am
FLG
-
STL
5h 11m
1 stop
$474American Airlines
Tue, May 12 - Sat, May 16
American Airlines Logo
8:55 am - 6:44 pm
STL
-
FLG
11h 49m
2 stops
American Airlines Logo
5:01 pm - 12:12 am
FLG
-
STL
5h 11m
1 stop
$484American Airlines
Tue, May 12 - Sat, May 16
American Airlines Logo
12:27 pm - 6:44 pm
STL
-
FLG
8h 17m
2 stops
American Airlines Logo
6:21 am - 5:21 pm
FLG
-
STL
9h 00m
2 stops
$489American Airlines
Tue, May 12 - Sat, May 16
American Airlines Logo
5:20 am - 11:51 am
STL
-
FLG
8h 31m
1 stop
American Airlines Logo
1:30 pm - 10:59 pm
FLG
-
STL
7h 29m
1 stop
$508American Airlines
Wed, Apr 15 - Wed, Apr 22
American Airlines Logo
5:20 am - 11:51 am
STL
-
FLG
8h 31m
1 stop
American Airlines Logo
11:41 am - 10:17 pm
FLG
-
STL
8h 36m
2 stops
$518American Airlines
Wed, Apr 15 - Wed, Apr 22
American Airlines Logo
5:20 am - 11:11 am
STL
-
FLG
7h 51m
2 stops
American Airlines Logo
11:41 am - 11:46 pm
FLG
-
STL
10h 05m
2 stops
$523American Airlines
Wed, Apr 15 - Wed, Apr 22
American Airlines Logo
5:20 am - 11:51 am
STL
-
FLG
8h 31m
1 stop
American Airlines Logo
5:01 pm - 12:12 am
FLG
-
STL
5h 11m
1 stop
$530American Airlines
Mon, May 4 - Mon, May 11
American Airlines Logo
2:37 pm - 6:42 pm
STL
-
FLG
6h 05m
1 stop
American Airlines Logo
7:52 pm - 8:54 am
FLG
-
STL
11h 02m
2 stops
$540American Airlines
Fri, Apr 24 - Mon, Apr 27
American Airlines Logo
4:30 pm - 10:57 pm
STL
-
FLG
8h 27m
2 stops
American Airlines Logo
7:52 pm - 8:25 am
FLG
-
STL
10h 33m
2 stops
$545American Airlines
Mon, May 4 - Mon, May 11
American Airlines Logo
8:36 am - 11:55 am
STL
-
FLG
5h 19m
1 stop
American Airlines Logo
6:50 am - 6:30 pm
FLG
-
STL
9h 40m
2 stops
$548American Airlines
Wed, Jun 24 - Sat, Jun 27

American Airlines flights from St. Louis to Flagstaff

Our best American Airlines deals on St. Louis to Flagstaff flight tickets
American Airlines
May 12
STL7:12 amLambert-St Louis
6h 43m
1 stop
FLG11:55 amFlagstaff Pulliam
May 16
FLG5:01 pmFlagstaff Pulliam
5h 11m
1 stop
STL12:12 amLambert-St Louis
$474
American Airlines
May 12
STL8:55 amLambert-St Louis
11h 49m
2 stops
FLG6:44 pmFlagstaff Pulliam
May 16
FLG5:01 pmFlagstaff Pulliam
5h 11m
1 stop
STL12:12 amLambert-St Louis
$484
American Airlines
May 12
STL12:27 pmLambert-St Louis
8h 17m
2 stops
FLG6:44 pmFlagstaff Pulliam
May 16
FLG6:21 amFlagstaff Pulliam
9h 00m
2 stops
STL5:21 pmLambert-St Louis
$489

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 March 23, 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
Quickest round-trip

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Tue 5/12

7:12 am-11:55 am

1 stop6h 43m

Flagstaff Pulliam

Sat 5/16

5:01 pm-12:12 am

1 stop5h 11m

$474

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Tue 5/12

8:55 am-6:44 pm

2 stops11h 49m

Flagstaff Pulliam

Sat 5/16

5:01 pm-12:12 am

1 stop5h 11m

$484

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Tue 5/12

12:27 pm-6:44 pm

2 stops8h 17m

Flagstaff Pulliam

Sat 5/16

6:21 am-5:21 pm

2 stops9h 00m

$489

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Wed 4/15

5:20 am-11:51 am

1 stop8h 31m

Flagstaff Pulliam

Wed 4/22

1:30 pm-10:59 pm

1 stop7h 29m

$508

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Wed 4/15

5:20 am-11:51 am

1 stop8h 31m

Flagstaff Pulliam

Wed 4/22

11:41 am-10:17 pm

2 stops8h 36m

$518

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Wed 4/15

5:20 am-11:11 am

2 stops7h 51m

Flagstaff Pulliam

Wed 4/22

11:41 am-11:46 pm

2 stops10h 05m

$523

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Mon 5/4

5:20 am-11:51 am

1 stop8h 31m

Flagstaff Pulliam

Mon 5/11

5:01 pm-12:12 am

1 stop5h 11m

$530

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Fri 4/24

2:37 pm-6:42 pm

1 stop6h 05m

Flagstaff Pulliam

Mon 4/27

7:52 pm-8:54 am

2 stops11h 02m

$540

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Mon 5/4

4:30 pm-10:57 pm

2 stops8h 27m

Flagstaff Pulliam

Mon 5/11

7:52 pm-8:25 am

2 stops10h 33m

$545

St. LouisFlagstaff

STL - FLG

STLFLG

Lambert-St Louis

Wed 6/24

8:36 am-11:55 am

1 stop5h 19m

Flagstaff Pulliam

Sat 6/27

6:50 am-6:30 pm

2 stops9h 40m

$548

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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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 September is, on average, the cheapest month to fly to Flagstaff from St. Louis, with most prices found around $435. The month of August is another great option to travel to Flagstaff, with average flight prices from St. Louis averaging around $465.

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

You could potentially save up to 37% 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 19m

Direct flights

None
The fastest flight from St. Louis to Flagstaff takes 5h 19m
There are no direct flights from St. Louis to Flagstaff. There are no popular flight routes from St. Louis to Flagstaff.
Search flight deals

  • 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 19m 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
11,488 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.

An easier way to manage your Flagstaff trip

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