Cheap flights from ONT to STL (Los Angeles - Ontario Intl. to Lambert-St. Louis Intl.)

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Cheap Flights from ONT to STL starting at $91 One Way, $169 Round Trip

Prices starting at $169 for return flights and $91 for one-way flights to Lambert-St. Louis Intl. were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Feb 26 - Mon, Mar 2
ONT
Ontario
STL
St. Louis
$169 Roundtrip, found 6 days ago
$169
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Thu, Feb 26 from Ontario to St. Louis, returning Mon, Mar 2, priced at $169 found 6 days ago
Sat, Feb 21 - Sat, Feb 28
ONT
Ontario
STL
St. Louis
$171 Roundtrip, found 6 days ago
$171
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Sat, Feb 21 from Ontario to St. Louis, returning Sat, Feb 28, priced at $171 found 6 days ago
Sat, Feb 28 - Wed, Mar 11
ONT
Ontario
STL
St. Louis
$189 Roundtrip, found 2 days ago
$189
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sat, Feb 28 from Ontario to St. Louis, returning Wed, Mar 11, priced at $189 found 2 days ago
Thu, May 7 - Mon, May 11
ONT
Ontario
STL
St. Louis
$190 Roundtrip, found 3 hours ago
$190
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Thu, May 7 from Ontario to St. Louis, returning Mon, May 11, priced at $190 found 3 hours ago
Thu, Feb 19 - Sat, Feb 28
ONT
Ontario
STL
St. Louis
$193 Roundtrip, found 5 days ago
$193
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Thu, Feb 19 from Ontario to St. Louis, returning Sat, Feb 28, priced at $193 found 5 days ago

Hotel Ideas near Lambert-St. Louis Intl.

Airport Hotels near Lambert-St. Louis Intl.

Pear Tree Inn St. Louis Airport

Pear Tree Inn St. Louis Airport

2.5 out of 5
10810 Pear Tree Ln St. Ann MO
$90 nightly
The price is $106 total per night from Feb 12 to Feb 13
$106 total
Feb 12 - Feb 13
Total with taxes and fees
Book a stay at this business-friendly hotel in St. Ann. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the breakfast and the helpful staff ...
9.2/10 Wonderful! (2,810 reviews)
Great stay

Reviewed on Feb 6, 2026

Pear Tree Inn St. Louis Airport
Hilton St. Louis Airport

Hilton St. Louis Airport

3.5 out of 5
10330 Natural Bridge Rd St. Louis MO
$114 nightly
The price is $136 total per night from Feb 15 to Feb 16
$136 total
Feb 15 - Feb 16
Total with taxes and fees
Book a stay at this business-friendly hotel in St. Louis. Enjoy 2 restaurants, breakfast (surcharge), and a free airport shuttle. Our guests praise the helpful ...
7.6/10 Good! (1,002 reviews)
Quiet and spacious room stood out. What didn’t, was the lack of fridge.

Reviewed on Jan 24, 2026

Hilton St. Louis Airport
Wingate by Wyndham St. Louis Airport

Wingate by Wyndham St. Louis Airport

2.5 out of 5
10820 Pear Tree Lane St. Ann MO
$97 nightly
The price is $114 total per night from Feb 16 to Feb 17
$114 total
Feb 16 - Feb 17
Total with taxes and fees
Book a stay at this business-friendly hotel in St. Ann. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the clean ...
9.2/10 Wonderful! (1,515 reviews)
Great stay

Reviewed on Feb 3, 2026

Wingate by Wyndham St. Louis Airport
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.

Hotels In St. Louis

21C Museum Hotel St Louis

21C Museum Hotel St Louis

4.5 out of 5
1528 Locust street St. Louis MO
$138 nightly
The price is $162 total per night from Feb 22 to Feb 23
$162 total
Feb 22 - Feb 23
Total with taxes and fees
Book a stay at this luxury hotel in St. Louis. Enjoy free WiFi, breakfast (surcharge), and room service. Our guests praise the pool and the restaurant in our ...
9/10 Wonderful! (1,592 reviews)
Hotel was very quiet and staff helpful and courteous. The coffee shop was great for coffee and breakfast and the rooms were clean with hot water and great water pressure. The only thing I would change was the mattress - bed was very firm, kind of felt like lying on a table. Gallery was a fun feature ...

Reviewed on Feb 3, 2026

21C Museum Hotel St Louis
Clayton Plaza Hotel & Extended Stay

Clayton Plaza Hotel & Extended Stay

3.5 out of 5
7750 Carondelet Avenue St. Louis MO
$105 nightly
The price is $123 total per night from Feb 26 to Feb 27
$123 total
Feb 26 - Feb 27
Total with taxes and fees
Book a stay at this business-friendly hotel in St. Louis. Enjoy free breakfast, free WiFi, and a 24-hour fitness center. Our guests praise the breakfast and ...
8.8/10 Excellent! (3,082 reviews)
Staff always pleasant

Reviewed on Feb 2, 2026

Clayton Plaza Hotel & Extended Stay
Pear Tree Inn St. Louis Airport

Pear Tree Inn St. Louis Airport

2.5 out of 5
10810 Pear Tree Ln St. Ann MO
$90 nightly
The price is $106 total per night from Feb 12 to Feb 13
$106 total
Feb 12 - Feb 13
Total with taxes and fees
Book a stay at this business-friendly hotel in St. Ann. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the breakfast and the helpful staff ...
9.2/10 Wonderful! (2,810 reviews)
Great stay

Reviewed on Feb 6, 2026

Pear Tree Inn St. Louis Airport
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.

St. Louis Hotels With Airport Transportation

Quality Inn St. Louis Airport Hotel

Quality Inn St. Louis Airport Hotel

2.5 out of 5
10232 Natural Bridge Rd St. Louis MO
$55 nightly
The price is $65 total per night from Feb 22 to Feb 23
$65 total
Feb 22 - Feb 23
Total with taxes and fees
Book a stay at this business-friendly hotel in St. Louis. Enjoy free WiFi, a free airport shuttle, and parking (surcharge). Our guests praise the helpful staff ...
6/10 (1,000 reviews)
YES DAY WERE FRIENDLY & NICE I WILL B BK

Reviewed on Feb 2, 2026

Quality Inn St. Louis Airport Hotel
Marriott St. Louis Airport

Marriott St. Louis Airport

4 out of 5
10700 Pear Tree Lane St. Louis MO
$145 nightly
The price is $173 total per night from Feb 20 to Feb 21
$173 total
Feb 20 - Feb 21
Total with taxes and fees
Book a stay at this business-friendly hotel in St. Louis. Enjoy breakfast (surcharge), a free airport shuttle, and room service. Our guests praise the helpful ...
7.8/10 Good! (1,000 reviews)
The staff was great and the hotel was beautiful for location. It looked well maintained.

Reviewed on Jan 11, 2026

Marriott St. Louis Airport
Hilton St. Louis Airport

Hilton St. Louis Airport

3.5 out of 5
10330 Natural Bridge Rd St. Louis MO
$114 nightly
The price is $136 total per night from Feb 15 to Feb 16
$136 total
Feb 15 - Feb 16
Total with taxes and fees
Book a stay at this business-friendly hotel in St. Louis. Enjoy 2 restaurants, breakfast (surcharge), and a free airport shuttle. Our guests praise the helpful ...
7.6/10 Good! (1,002 reviews)
Quiet and spacious room stood out. What didn’t, was the lack of fridge.

Reviewed on Jan 24, 2026

Hilton St. Louis Airport
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.

Low Priced St. Louis Hotels

Quality Inn St. Louis Airport Hotel

Quality Inn St. Louis Airport Hotel

2.5 out of 5
10232 Natural Bridge Rd St. Louis MO
$55 nightly
The price is $65 total per night from Feb 22 to Feb 23
$65 total
Feb 22 - Feb 23
Total with taxes and fees
Book a stay at this business-friendly hotel in St. Louis. Enjoy free WiFi, a free airport shuttle, and parking (surcharge). Our guests praise the helpful staff ...
6/10 (1,000 reviews)
YES DAY WERE FRIENDLY & NICE I WILL B BK

Reviewed on Feb 2, 2026

Quality Inn St. Louis Airport Hotel
Americas Best Value Inn St. Louis Downtown

Americas Best Value Inn St. Louis Downtown

2 out of 5
1100 Lumiere Place Boulevard St. Louis MO
$67 nightly
The price is $79 total per night from Mar 2 to Mar 3
$79 total
Mar 2 - Mar 3
Total with taxes and fees
Stay at this motel in St. Louis. Enjoy free WiFi, free parking, and a 24-hour front desk. Popular attractions Gateway Arch and St. Louis Union Station are located ...
5.6/10 (826 reviews)
We needed a place near the convention center that wasn't crazy expensive. The worker and manager were both very friendly.

Reviewed on Dec 9, 2025

Americas Best Value Inn St. Louis Downtown
OYO Hotel St. Louis Downtown City Center MO

OYO Hotel St. Louis Downtown City Center MO

3.5 out of 5
400 S 14th St St. Louis MO
Book a stay at this business-friendly hotel in St. Louis. Enjoy free WiFi, a fitness center, and parking (surcharge). Our guests praise the helpful staff and ...
Definitely an older hotel. Overall the room was kinda dingy.

Reviewed on Apr 11, 2024

Get rates
OYO Hotel St. Louis Downtown City Center MO
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.

Family Friendly Hotels in St. Louis

Days Inn by Wyndham St. Louis Lindbergh Boulevard

Days Inn by Wyndham St. Louis Lindbergh Boulevard

2.5 out of 5
South Lindbergh Boulevard, 3660 St. Louis MO
Book a stay at this family-friendly hotel in St. Louis. Enjoy free breakfast, free WiFi, and a nightclub. Popular attractions Laumeier Sculpture Park and Magic ...
6.6/10 (1,000 reviews)

Families like: Indoor pool, playground, game room, cribs

Travelers say...
The Pool, and things for the kids to do was great.

Reviewed on Feb 18, 2021

Get rates
Days Inn by Wyndham St. Louis Lindbergh Boulevard
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
$131 nightly
The price is $153 total per night from Feb 12 to Feb 13
$153 total
Feb 12 - Feb 13
Total with taxes and fees
Book a stay at this business-friendly hotel in St. Louis. Enjoy free breakfast, free WiFi, and a fitness center. Our guests praise the breakfast and the pool ...
9.4/10 Exceptional! (3,322 reviews)
Yes… never was in a hotel where complimentary dinner included.

Reviewed on Feb 5, 2026

Drury Plaza Hotel St. Louis at the Arch
Pear Tree Inn St. Louis Near Union Station

Pear Tree Inn St. Louis Near Union Station

3 out of 5
2211 Market Street St. Louis MO
$94 nightly
The price is $110 total per night from Feb 12 to Feb 13
$110 total
Feb 12 - Feb 13
Total with taxes and fees
Book a stay at this business-friendly hotel in St. Louis. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the breakfast and the restaurant ...
8.8/10 Excellent! (1,815 reviews)
Nice staff

Reviewed on Feb 4, 2026

Pear Tree Inn St. Louis Near Union Station
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.

ONT to STL Route Info

Origin Airport
Destination Airport
Number Of Airlines Serving
Distance
Shortest Flight Departure Time
Shortest Flight Departure Date
ONT Address & GPS
Address:
2900 E. Airport Drive
Ontario CA, 91761
United States
IATA Code:
ONT
Longitude:
-117.601193
Latitude:
34.056001
Time Zone:
America/Los_Angeles
STL Address & GPS
Address:
10701 Lambert International Blvd.
Saint Louis MO, 63145
United States
IATA Code:
STL
Longitude:
-90.379002
Latitude:
38.748707
Time Zone:
America/Chicago

Frequently asked questions

Are there non-stop flights from ONT to Lambert Field?
Traveling from Los Angeles - Ontario Intl. Airport (ONT) to Lambert Field? Breaking up the journey is your only option as there are no airlines that operate directly on this route. However, Southwest Airlines, American Airlines and United Airlines offer the closest thing — a flight with just one stop.
What is the shortest flight from Los Angeles - Ontario Intl. Airport (ONT) to St. Louis Lambert International Airport?
The fastest you can fly from ONT to St. Louis Lambert International Airport is 4 hours and 47 minutes. Slip a few things into your hand luggage to stop you from getting bored, like a gripping read or your travel journal.
How many hours flight from Ontario Airport to Lambert Field?
It typically takes about 4 hours and 51 minutes to get from Los Angeles - Ontario Intl. Airport (ONT) to STL. You'll be on board for a while, so think about bringing some entertainment, like an engrossing book or some crossword puzzles.
What airlines have the most flights from Ontario Airport to St. Louis Lambert International Airport?
For now, there aren't any direct flights from ONT to STL. However, you can find flights with one or more stops. There's always a positive side — use the break to get the blood flowing again or grab a decent coffee!

Map To Nearby Hotels

Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.