Search Cheap Flights to
O'Fallon

Search 400 airlines and 321,000 hotels worldwide.

Stop Planning & Start Exploring

FREE 24 hour cancellation on most flights

O'Fallon Flights as Low as $108

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Frontier Airlines
Mon, Nov 2 - Mon, Nov 16
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$108 Roundtrip, found 2 days ago
$108
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Mon, Nov 2 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Mon, Nov 16, priced at $108 found 2 days ago
Frontier Airlines
Thu, Sep 10 - Thu, Sep 24
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$110 Roundtrip, found 2 days ago
$110
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Sep 10 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Thu, Sep 24, priced at $110 found 2 days ago
Frontier Airlines
Thu, Sep 3 - Sun, Sep 6
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$115 Roundtrip, found 3 days ago
$115
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Thu, Sep 3 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Sun, Sep 6, priced at $115 found 3 days ago
Frontier Airlines
Tue, Sep 1 - Tue, Sep 8
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$116 Roundtrip, found 3 days ago
$116
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Tue, Sep 1 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Tue, Sep 8, priced at $116 found 3 days ago
Frontier Airlines
Tue, Sep 8 - Thu, Sep 10
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$123 Roundtrip, found 1 day ago
$123
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Sep 8 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Thu, Sep 10, priced at $123 found 1 day ago
Frontier Airlines
Sun, Sep 6 - Thu, Sep 24
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$125 Roundtrip, found 3 days ago
$125
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sun, Sep 6 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Thu, Sep 24, priced at $125 found 3 days ago
Delta
Sat, Sep 5 - Sat, Sep 5
SEA
Seattle - Tacoma Intl.
STL
Lambert-St. Louis Intl.
$181 Roundtrip, found 1 day ago
$181
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Sep 5 from Seattle - Tacoma Intl. to Lambert-St. Louis Intl., returning Sat, Sep 5, priced at $181 found 1 day ago
American Airlines
Tue, Sep 8 - Thu, Sep 10
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$183 Roundtrip, found 1 day ago
$183
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Sep 8 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Thu, Sep 10, priced at $183 found 1 day ago
Bargain Flight
Wed, Aug 19 - Sat, Aug 22
DTW
Detroit Metropolitan Wayne County
STL
Lambert-St. Louis Intl.
$187 Roundtrip, found 2 days ago
$187
Roundtrip
found 2 days ago
Select Bargain Flight flight, departing Wed, Aug 19 from Detroit Metropolitan Wayne County to Lambert-St. Louis Intl., returning Sat, Aug 22, priced at $187 found 2 days ago
Delta
Tue, Sep 8 - Fri, Sep 11
DAL
Love Field
STL
Lambert-St. Louis Intl.
$208 Roundtrip, found 3 days ago
$208
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Sep 8 from Love Field to Lambert-St. Louis Intl., returning Fri, Sep 11, priced at $208 found 3 days ago
Bargain Flight
Sun, Aug 2 - Sun, Aug 2
CMH
John Glenn Columbus Intl.
STL
Lambert-St. Louis Intl.
$245 Roundtrip, found 1 day ago
$245
Roundtrip
found 1 day ago
Select Bargain Flight flight, departing Sun, Aug 2 from John Glenn Columbus Intl. to Lambert-St. Louis Intl., returning Sun, Aug 2, priced at $245 found 1 day ago
Delta
Thu, Aug 20 - Wed, Sep 9
OKC
Will Rogers World
STL
Lambert-St. Louis Intl.
$257 Roundtrip, found 1 day ago
$257
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Aug 20 from Will Rogers World to Lambert-St. Louis Intl., returning Wed, Sep 9, priced at $257 found 1 day ago
Bargain Flight
Wed, Nov 11 - Mon, Nov 16
BOS
Logan Intl.
STL
Lambert-St. Louis Intl.
$262 Roundtrip, found 2 days ago
$262
Roundtrip
found 2 days ago
Select Bargain Flight flight, departing Wed, Nov 11 from Logan Intl. to Lambert-St. Louis Intl., returning Mon, Nov 16, priced at $262 found 2 days ago
Alaska Airlines
Tue, Sep 29 - Tue, Sep 29
SEA
Seattle - Tacoma Intl.
STL
Lambert-St. Louis Intl.
$342 Roundtrip, found 5 days ago
$342
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Sep 29 from Seattle - Tacoma Intl. to Lambert-St. Louis Intl., returning Tue, Sep 29, priced at $342 found 5 days ago
Alaska Airlines
Wed, Sep 2 - Sat, Sep 5
PAE
Seattle Paine Field Intl. Airport
STL
Lambert-St. Louis Intl.
$413 Roundtrip, found 4 days ago
$413
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed, Sep 2 from Seattle Paine Field Intl. Airport to Lambert-St. Louis Intl., returning Sat, Sep 5, priced at $413 found 4 days ago
Southwest Airlines
Mon, Aug 10 - Fri, Aug 14
SEA
Seattle - Tacoma Intl.
STL
Lambert-St. Louis Intl.
$622 Roundtrip, found 3 hours ago
$622
Roundtrip
found 3 hours ago
Select Southwest Airlines flight, departing Mon, Aug 10 from Seattle - Tacoma Intl. to Lambert-St. Louis Intl., returning Fri, Aug 14, priced at $622 found 3 hours ago

Cheap Flights to O'Fallon

Fall in love at first flight with your vacation to O'Fallon by saving a ton of cash on your last-minute cheap flight. There’s no more scouring the internet for a good deal—book your flight to O'Fallon on Hotwire, and you’ll be up, up, and on a getaway in no time.

Because once the wheels are down in O'Fallon, the good times start rolling. So buckle up, you’re in for a fun ride.

Frequently Asked Questions About flights to O'Fallon

Don’t waste your time on endless searches for cheap airline tickets oneway or roundtrip. We’ll have you on your way to O'Fallon with a tiny bag of pretzels in your hand before you can say “tray tables in the upright position”—and for a ticket price that works for your vacay budget.

So all you have to worry about is where you’re headed after the STL airport.

What is the cheapest month to fly to O'Fallon?

Airline ticket prices fluctuate all the time, depending on the day of the week or the month of the year. The cheapest round trip flights to O'Fallon are in November, but when you book your flight on Hotwire, savings are always in season.

How many airlines fly to O'Fallon?

Variety is the spice of life, even when it comes to booking your next trip. Want options for airlines? You’ll find 13 to choose from for your flight to O'Fallon.

What airport is best to fly into O'Fallon?

When you’re planning your trip to O'Fallon, convenience is the name of the game. Luckily, O'Fallon MidAmerica-St. Louis Airport is nearby so you can deplane and get going on checking off everything on your O'Fallon must-do list.

How much are flights to O'Fallon?

Got very cheap flights on your vacation itinerary? When you book your airline tickets to O'Fallon on Hotwire, you may just get what’s on your getaway wish list. With tickets as low as $108, you’ll have leftover cash for at least a magazine and a bottle of water at the airport book store.

How to get cheap flights to O'Fallon?

The trick to saving a stack of cash on your flight to O'Fallon? Snatch up that Hotwire flight deal when you see a killer rate because it could be gone in a flash. And with flights as low as $108 right now, why wait?

O'Fallon Flight Information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Roundtrip price
$108

Last Minute Hotel Deals in O'Fallon

Drury Inn & Suites St. Louis O'Fallon, IL

Drury Inn & Suites St. Louis O'Fallon, IL

3 out of 5
1118 Central Park Drive O'Fallon IL
Book a stay at this business-friendly hotel in O'Fallon. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the breakfast and the helpful staff ...
9.6/10 Exceptional! (1,001 reviews)
"Pool was so much fun and my daughter’s birthday was recognized by the staff when we checked in that was so nice! Also I thought I left something in the room the staff went above and beyond to look for our missing item. We also enjoyed the drinks in the evening."

Reviewed on Jul 29, 2026

Get rates
Drury Inn & Suites St. Louis O'Fallon, IL
Super 8 by Wyndham O'Fallon

Super 8 by Wyndham O'Fallon

2 out of 5
1100 Eastgate Dr O'Fallon IL
Book a stay at this business-friendly hotel in O'Fallon. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the clean ...
6.6/10 (1,055 reviews)
"Fine and clean room but they need more options for breakfast in the morning times"

Reviewed on Jul 30, 2026

Get rates
Super 8 by Wyndham O'Fallon
Quality Inn O'Fallon - St. Louis - Shiloh

Quality Inn O'Fallon - St. Louis - Shiloh

3 out of 5
1409 W US 50 O'Fallon IL
Book a stay at this business-friendly hotel in O'Fallon. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the clean ...
7.4/10 Good! (1,000 reviews)
"Parking was well lit. W arrived late but there were staff ready for us. Room was clean and ready."

Reviewed on Jul 30, 2026

Get rates
Quality Inn O'Fallon - St. Louis - Shiloh
Welcome Suites

Welcome Suites

2 out of 5
148 Regency Park O'Fallon IL
Book a stay at this business-friendly hotel in O'Fallon. Enjoy free WiFi, free parking, and a fitness center. Popular attractions O'Fallon Family Sports Park ...
6/10 (302 reviews)
"I like that it had a kitchen. Don't give linens but once a week. Very dirty had to clean myself. And the front desk staff was VERY RUDE!"

Reviewed on Jul 30, 2026

Get rates
Welcome Suites
Comfort Inn & Suites O'Fallon - St. Louis Area

Comfort Inn & Suites O'Fallon - St. Louis Area

2 out of 5
116 Regency Park O'Fallon IL
Book a stay at this business-friendly hotel in O'Fallon. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff in our reviews. ...
Get rates
Comfort Inn & Suites O'Fallon - St. Louis Area
Sleep Inn O'Fallon near I-64

Sleep Inn O'Fallon near I-64

2.5 out of 5
140 Venita Dr O'Fallon IL
Book a stay at this business-friendly hotel in O'Fallon. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the clean ...
6.8/10 (992 reviews)
"Gagging amount of air freshener to try covering other odors. Swimming pool was closed for cleaning. Most of electric outlets in room did not work. No hot water in morning, even though I ran water a long time. Carpet was filthy, and gooey to walk on. TV remote and other things were sticky. Online ..."

Reviewed on Jul 27, 2026

Get rates
Sleep Inn O'Fallon near I-64
Hyatt Regency St. Louis at The Arch

Hyatt Regency St. Louis at The Arch

4 out of 5
315 Chestnut St St. Louis MO
Book a stay at this business-friendly hotel in St. Louis. Enjoy free WiFi, 3 restaurants, and 2 bars/lounges. Our guests praise the helpful staff and the clean ...
8.6/10 Excellent! (4,128 reviews)
"The hotel is very close to the arch. Depending on where your room is you have beautiful views of the arch and Mississippi. The hotel is well kept. They have several entrances and seating areas. Plenty of elevators to get to your room. The room was clean and kept. They also have food options on the ..."

Reviewed on Jul 30, 2026

Get rates
Hyatt Regency St. Louis at The Arch
Drury Plaza Hotel St. Louis at the Arch

Drury Plaza Hotel St. Louis at the Arch

3 out of 5
2 South 4th Street St. Louis MO
Book a stay at this business-friendly hotel in St. Louis. Enjoy free breakfast, free WiFi, and 2 hot tubs. Our guests praise the breakfast and the pool in our ...
Get rates
Drury Plaza Hotel St. Louis at the Arch
See all 1,512 properties in O'Fallon
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.