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Cheap flights from St. Louis to Flagstaff from $390

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 9/15. 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
2:30 pm - 8:07 pmSTL  Lambert-St Louis-FLG Flagstaff Pulliam
7h 37m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
11:43 am - 8:52 pmFLG  Flagstaff Pulliam-STL Lambert-St Louis
7h 09m1 stop Phoenix Sky Harbor Intl
$484American Airlines
mer, set 9 - mer, set 16
American Airlines Logo
5:43 am - 9:14 amSTL  Lambert-St Louis-FLG Flagstaff Pulliam
5h 31m1 stop Dallas/Fort Worth
American Airlines Logo
11:43 am - 8:52 pmFLG  Flagstaff Pulliam-STL Lambert-St Louis
7h 09m1 stop Phoenix Sky Harbor Intl
$484American Airlines
sab, set 19 - mar, set 22
American Airlines Logo
7:24 am - 12:50 pmSTL  Lambert-St Louis-FLG Flagstaff Pulliam
6h 26m1 stop Dallas/Fort Worth
American Airlines Logo
1:22 pm - 9:59 pmFLG  Flagstaff Pulliam-STL Lambert-St Louis
7h 37m1 stop Dallas/Fort Worth
$484American Airlines
mer, dic 9 - sab, dic 12
American Airlines Logo
6:32 am - 12:05 pmSTL  Lambert-St Louis-FLG Flagstaff Pulliam
7h 33m1 stop Dallas/Fort Worth
American Airlines Logo
11:52 am - 8:43 pmFLG  Flagstaff Pulliam-STL Lambert-St Louis
6h 51m1 stop Phoenix Sky Harbor Intl
$522American Airlines
sab, ott 17 - ven, ott 23
American Airlines Logo
5:40 am - 12:05 pmSTL  Lambert-St Louis-FLG Flagstaff Pulliam
8h 25m1 stop Dallas/Fort Worth
American Airlines Logo
11:52 am - 8:43 pmFLG  Flagstaff Pulliam-STL Lambert-St Louis
6h 51m1 stop Phoenix Sky Harbor Intl
$522American Airlines
gio, ott 15 - mer, ott 21
American Airlines Logo
5:43 am - 11:53 amSTL  Lambert-St Louis-FLG Flagstaff Pulliam
8h 10m1 stop Dallas/Fort Worth
American Airlines Logo
12:37 pm - 9:57 pmFLG  Flagstaff Pulliam-STL Lambert-St Louis
7h 20m1 stop Dallas/Fort Worth
$522American Airlines
mer, set 23 - gio, ott 1
American Airlines Logo
5:43 am - 9:14 amSTL  Lambert-St Louis-FLG Flagstaff Pulliam
5h 31m1 stop Dallas/Fort Worth
American Airlines Logo
10:40 am - 11:43 pmFLG  Flagstaff Pulliam-STL Lambert-St Louis
11h 03m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth
$532American Airlines
sab, set 19 - mar, set 22
American Airlines Logo
5:42 am - 11:54 amSTL  Lambert-St Louis-FLG Flagstaff Pulliam
8h 12m1 stop Dallas/Fort Worth
American Airlines Logo
10:30 am - 5:37 pmFLG  Flagstaff Pulliam-STL Lambert-St Louis
5h 07m1 stop Phoenix Sky Harbor Intl
$552American Airlines
mar, ago 25 - sab, ago 29
American Airlines Logo
7:24 am - 6:35 pmSTL  Lambert-St Louis-FLG Flagstaff Pulliam
12h 11m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl
American Airlines Logo
1:22 pm - 9:59 pmFLG  Flagstaff Pulliam-STL Lambert-St Louis
7h 37m1 stop Dallas/Fort Worth
$558American Airlines
mer, dic 9 - sab, dic 12
American Airlines Logo
10:14 am - 8:07 pmSTL  Lambert-St Louis-FLG Flagstaff Pulliam
11h 53m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl
American Airlines Logo
11:43 am - 8:52 pmFLG  Flagstaff Pulliam-STL Lambert-St Louis
7h 09m1 stop Phoenix Sky Harbor Intl
$558American Airlines
mer, set 9 - mer, set 16

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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
Sep 9
STL2:30 pmLambert-St Louis
7h 37m
1 stop
FLG8:07 pmFlagstaff Pulliam
Sep 16
FLG11:43 amFlagstaff Pulliam
7h 09m
1 stop
STL8:52 pmLambert-St Louis
$484
American Airlines
Sep 23
STL5:43 amLambert-St Louis
8h 10m
1 stop
FLG11:53 amFlagstaff Pulliam
Oct 1
FLG12:37 pmFlagstaff Pulliam
7h 20m
1 stop
STL9:57 pmLambert-St Louis
$522
American Airlines
Sep 19
STL5:43 amLambert-St Louis
5h 31m
1 stop
FLG9:14 amFlagstaff Pulliam
Sep 22
FLG10:40 amFlagstaff Pulliam
11h 03m
2 stops
STL11:43 pmLambert-St Louis
$532

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 agosto 14, 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 Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

mer 9/9

2:30 pm-8:07 pm

1 stop7h 37m

Flagstaff Pulliam

mer 9/16

11:43 am-8:52 pm

1 stop7h 09m

$484
Quickest round-trip

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

sab 9/19

5:43 am-9:14 am

1 stop5h 31m

Flagstaff Pulliam

mar 9/22

11:43 am-8:52 pm

1 stop7h 09m

$484

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

mer 12/9

7:24 am-12:50 pm

1 stop6h 26m

Flagstaff Pulliam

sab 12/12

1:22 pm-9:59 pm

1 stop7h 37m

$484

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

sab 10/17

6:32 am-12:05 pm

1 stop7h 33m

Flagstaff Pulliam

ven 10/23

11:52 am-8:43 pm

1 stop6h 51m

$522

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

gio 10/15

5:40 am-12:05 pm

1 stop8h 25m

Flagstaff Pulliam

mer 10/21

11:52 am-8:43 pm

1 stop6h 51m

$522

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

mer 9/23

5:43 am-11:53 am

1 stop8h 10m

Flagstaff Pulliam

gio 10/1

12:37 pm-9:57 pm

1 stop7h 20m

$522

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

sab 9/19

5:43 am-9:14 am

1 stop5h 31m

Flagstaff Pulliam

mar 9/22

10:40 am-11:43 pm

2 stops11h 03m

$532

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

mar 8/25

5:42 am-11:54 am

1 stop8h 12m

Flagstaff Pulliam

sab 8/29

10:30 am-5:37 pm

1 stop5h 07m

$552

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

mer 12/9

7:24 am-6:35 pm

2 stops12h 11m

Flagstaff Pulliam

sab 12/12

1:22 pm-9:59 pm

1 stop7h 37m

$558

St. LouisFlagstaff

STL Lambert-St Louis - FLG Flagstaff Pulliam

STLFLG

Lambert-St Louis

mer 9/9

10:14 am-8:07 pm

2 stops11h 53m

Flagstaff Pulliam

mer 9/16

11:43 am-8:52 pm

1 stop7h 09m

$558

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 March is, on average, the cheapest month to fly to Flagstaff from St. Louis, with most prices found around $485. The month of August is another great option to travel to Flagstaff, with average flight prices from St. Louis averaging around $516.

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 15m

Direct flights

None
The fastest flight from St. Louis to Flagstaff takes 5h 15m
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 15m 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
11,929 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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