$206 Cheap Flights from Flagstaff (FLG) to St. Louis (STL)

View $206 flight on Thu, Oct 30, 2025Opens in a new window

Popular airlines from Flagstaff Pulliam Field (FLG) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Flagstaff to St. Louis (FLG-STL)

Prices were available within the past 7 days and start at $206 for one-way flights and $356 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Dec 30 - Tue, Jan 6
FLG
Flagstaff
STL
St. Louis
$356 Roundtrip, found 14 hours ago
$356
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Tue, Dec 30 from Flagstaff to St. Louis, returning Tue, Jan 6, priced at $356 found 14 hours ago
American Airlines
Tue, Oct 21 - Sun, Oct 26
FLG
Flagstaff
STL
St. Louis
$396 Roundtrip, found 4 days ago
$396
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Oct 21 from Flagstaff to St. Louis, returning Sun, Oct 26, priced at $396 found 4 days ago
American Airlines
Thu, Oct 30 - Fri, Oct 31
FLG
Flagstaff
STL
St. Louis
$406 Roundtrip, found 4 days ago
$406
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, Oct 30 from Flagstaff to St. Louis, returning Fri, Oct 31, priced at $406 found 4 days ago
American Airlines
Thu, Jan 8 - Sun, Jan 25
FLG
Flagstaff
STL
St. Louis
$436 Roundtrip, found 5 hours ago
$436
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Thu, Jan 8 from Flagstaff to St. Louis, returning Sun, Jan 25, priced at $436 found 5 hours ago
American Airlines
Thu, Feb 19 - Tue, Mar 10
FLG
Flagstaff
STL
St. Louis
$446 Roundtrip, found 5 hours ago
$446
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Thu, Feb 19 from Flagstaff to St. Louis, returning Tue, Mar 10, priced at $446 found 5 hours ago
American Airlines
Thu, Feb 19 - Mon, Mar 9
FLG
Flagstaff
STL
St. Louis
$451 Roundtrip, found 5 hours ago
$451
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Thu, Feb 19 from Flagstaff to St. Louis, returning Mon, Mar 9, priced at $451 found 5 hours ago
American Airlines
Fri, Feb 6 - Sun, Feb 22
FLG
Flagstaff
STL
St. Louis
$456 Roundtrip, found 5 hours ago
$456
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Fri, Feb 6 from Flagstaff to St. Louis, returning Sun, Feb 22, priced at $456 found 5 hours ago
American Airlines
Fri, Feb 6 - Sun, Feb 22
FLG
Flagstaff
STL
St. Louis
$466 Roundtrip, found 13 hours ago
$466
Roundtrip
found 13 hours ago
Select American Airlines flight, departing Fri, Feb 6 from Flagstaff to St. Louis, returning Sun, Feb 22, priced at $466 found 13 hours ago
American Airlines
Tue, Oct 21 - Sun, Oct 26
FLG
Flagstaff
STL
St. Louis
$476 Roundtrip, found 1 hour ago
$476
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Tue, Oct 21 from Flagstaff to St. Louis, returning Sun, Oct 26, priced at $476 found 1 hour ago
American Airlines
Sun, Jan 11 - Sun, Jan 25
FLG
Flagstaff
STL
St. Louis
$486 Roundtrip, found 5 hours ago
$486
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Sun, Jan 11 from Flagstaff to St. Louis, returning Sun, Jan 25, priced at $486 found 5 hours ago

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $556
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $556
Flights from Flagstaff (FLG) to St. Louis (STL)
Origin airport
Flagstaff Pulliam Field
Destination airport
Lambert-St. Louis Intl.
Roundtrip price
$355
Distance
1199 mi

Flagstaff to St. Louis Flights

The cheapest times to fly from Flagstaff to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Flagstaff to St. Louis are during the month of December. You can find some of the cheapest flights from Flagstaff to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Flagstaff to St. Louis

Sunday is one of the best days to book for cheap flights from Flagstaff to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Flagstaff to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Flagstaff to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $206 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Flagstaff to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Flagstaff to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Flagstaff Pulliam Field Airport (FLG) to Lambert-St. Louis Intl. Airport (STL) cost?
Grab a cheap one-way flight from $206 or cheap return flight from $356 from Flagstaff Pulliam Field Airport (FLG) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Flagstaff Pulliam Field Airport (FLG) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from FLG to STL is December, when there's less demand. Off-peak months are often when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Flagstaff Pulliam Field Airport (FLG) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest FLG to STL flight.
How many flights per day from Flagstaff Pulliam Field Airport (FLG) to Lambert-St. Louis Intl. Airport (STL)?
Direct flights from Flagstaff Pulliam Field Airport (FLG) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from FLG to STL?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Flagstaff Pulliam Field Airport (FLG) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Flagstaff Pulliam Field Airport (FLG) to Lambert-St. Louis Intl. Airport (STL) route, aim to travel before 3 PM. Flights after this time have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Flagstaff Pulliam Field Airport (FLG) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your ticket from FLG to STL shortly before your journey is generally more expensive. But if there's some wiggle room with your travel times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a FLG to STL flight and hotel package?
Compared with arranging hotels and flights separately, booking a FLG to STL flight and hotel package with Expedia could result in significant savings. What's more, having everything in one easy place will take the hassle out of travel planning. Simply secure your flights and select from our extensive range of stays, then customize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Flagstaff Pulliam Field Airport (FLG) to Lambert-St. Louis Intl. Airport (STL)?
You can usually cancel or reschedule your FLG to STL flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.