Flights from St. Louis Lambert International Airport to Ontario International Airport
Cheap Flight Deals from St. Louis Lambert International Airport to Ontario International Airport
Search for flights from St. Louis to Los Angeles and check out affordable one-way and round-trip options.
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STL 18:537h 6m1 stopsONT 23:59St. Louis - Ontario | Sat, May 3 | Frontier Airlines
SIN 00:596h 10m1 stopsSTL 09:09Ontario - St. Louis | Wed, May 7 | Frontier AirlinesNZD 198 NZD 34242% OFF42% OFFNZD 342 NZD 198 -
STL 18:517h 8m1 stopsONT 23:59St. Louis - Ontario | Sat, Apr 19 | Frontier Airlines
SIN 00:596h 7m1 stopsSTL 09:06Ontario - St. Louis | Mon, Apr 21 | Frontier AirlinesNZD 229 NZD 34233% OFF33% OFFNZD 342 NZD 229
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STL 21:5525h 32m1 stopsONT 21:27St. Louis - Ontario | Fri, May 2 | Frontier Airlines
SIN 00:596h 10m1 stopsSTL 09:09Ontario - St. Louis | Sat, May 10 | Frontier AirlinesNZD 240 NZD 34230% OFF30% OFFNZD 342 NZD 240
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STL 21:5511h 29m1 stopsONT 07:24St. Louis - Ontario | Sun, May 4 | Frontier Airlines
SIN 00:5912h 8m1 stopsSTL 15:07Ontario - St. Louis | Thu, May 8 | Frontier AirlinesNZD 24328% OFFNZD 342 NZD 243
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STL 21:5513h 58m1 stopsONT 09:53St. Louis - Ontario | Mon, Apr 28 | Frontier Airlines
SIN 16:5929h 5m1 stopsSTL 00:04Ontario - St. Louis | Tue, Apr 29 | Frontier AirlinesNZD 25027% OFFNZD 342 NZD 250
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STL 18:587h 1m1 stopsONT 23:59St. Louis - Ontario | Wed, Apr 23 | Frontier Airlines
SIN 00:597h 2m1 stopsSTL 10:01Ontario - St. Louis | Mon, Apr 28 | Frontier AirlinesNZD 25625% OFFNZD 342 NZD 256
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STL 18:587h 1m1 stopsONT 23:59St. Louis - Ontario | Wed, Apr 30 | Frontier Airlines
SIN 00:596h 10m1 stopsSTL 09:09Ontario - St. Louis | Wed, May 7 | Frontier AirlinesNZD 27021% OFFNZD 342 NZD 270
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STL 21:5517h 21m1 stopsONT 13:16St. Louis - Ontario | Thu, May 8 | Frontier Airlines
SIN 00:596h 10m1 stopsSTL 09:09Ontario - St. Louis | Wed, May 14 | Frontier AirlinesNZD 29015% OFFNZD 342 NZD 290
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STL 18:587h 1m1 stopsONT 23:59St. Louis - Ontario | Fri, Apr 25 | Frontier Airlines
SIN 00:5912h 8m1 stopsSTL 15:07Ontario - St. Louis | Thu, May 1 | Frontier AirlinesNZD 29913% OFFNZD 342 NZD 299
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STL 21:5513h 59m1 stopsONT 09:54St. Louis - Ontario | Mon, May 12 | Frontier Airlines
SIN 16:5929h 7m1 stopsSTL 00:06Ontario - St. Louis | Tue, May 13 | Frontier AirlinesNZD 30112% OFFNZD 342 NZD 301
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STL 13:0017h 25m1 stopsLAX Invalid DateSt. Louis - Los Angeles | Mon, Apr 21 | Normal Airline
LAX 15:006hDirectSTL 16:00Los Angeles - St. Louis | Wed, Apr 23 | Normal AirlineFind More FlightsFind More Flights
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STL 21:5511h 25m1 stopsONT 07:20St. Louis - Ontario | Sun, Apr 27 | Frontier AirlinesNZD 128 NZD 21039% OFF39% OFFNZD 210 NZD 128
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STL 21:5513h 58m1 stopsONT 09:53St. Louis - Ontario | Mon, Apr 28 | Frontier AirlinesNZD 130 NZD 21038% OFF38% OFFNZD 210 NZD 130
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STL 18:587h 1m1 stopsONT 23:59St. Louis - Ontario | Sat, Apr 26 | Frontier AirlinesNZD 134 NZD 21036% OFF36% OFFNZD 210 NZD 134
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STL 16:079h 52m1 stopsONT 23:59St. Louis - Ontario | Thu, May 15 | Frontier AirlinesNZD 13834% OFFNZD 210 NZD 138
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STL 21:5525h 28m1 stopsONT 21:23St. Louis - Ontario | Fri, Apr 25 | Frontier AirlinesNZD 14033% OFFNZD 210 NZD 140
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STL 21:5511h 29m1 stopsONT 07:24St. Louis - Ontario | Sun, May 11 | Frontier AirlinesNZD 14232% OFFNZD 210 NZD 142
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STL 21:5516h 13m1 stopsONT 12:08St. Louis - Ontario | Mon, May 12 | Frontier AirlinesNZD 14730% OFFNZD 210 NZD 147
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STL 18:537h 6m1 stopsONT 23:59St. Louis - Ontario | Sat, May 3 | Frontier AirlinesNZD 15526% OFFNZD 210 NZD 155
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STL 21:5511h 29m1 stopsONT 07:24St. Louis - Ontario | Fri, May 2 | Frontier AirlinesNZD 18413% OFFNZD 210 NZD 184
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STL 21:5517h 19m1 stopsONT 13:14St. Louis - Ontario | Thu, Apr 24 | Frontier AirlinesNZD 18512% OFFNZD 210 NZD 185
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STL 13:0017h 25m1 stopsLAX Invalid DateSt. Louis - Los Angeles | Mon, Apr 21 | Normal AirlineFind More FlightsFind More Flights
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
Selected Airlines from St. Louis Lambert International Airport to Ontario International Airport
See which airlines fly from St. Louis to Los Angeles. Find the airline that best meets your travel needs by comparing prices and treat yourself to an enjoyable journey.
Find more flights and airlines
Flight Schedule from St. Louis Lambert International Airport to Ontario International Airport
Check the schedule for flights from St. Louis to Los Angeles and find the flight that best matches your travel plans.
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DL2363
St. Louis Lambert International Airport
7:40 AM
STL
9:58 AM
SLC
S M T W T F SSearch -
DL1345
Salt Lake City International Airport
11:30 AM
SLC
12:16 PM
ONT
S M T W T F S -
F94567
St. Louis Lambert International Airport
7:29 PM
STL
8:58 PM
DEN
S M T - T F SSearch -
F91499
Denver International Airport
10:29 PM
DEN
11:50 PM
ONT
S M T W T F S -
DL1492
St. Louis Lambert International Airport
6:59 PM
STL
9:11 PM
SLC
S M T W T F SSearch -
DL1614
Salt Lake City International Airport
9:20 PM
SLC
10:05 PM
ONT
S M T W T F S -
DL2355
St. Louis Lambert International Airport
12:51 PM
STL
3:26 PM
ATL
S M T W T F SSearch -
DL770
Hartsfield-Jackson Atlanta International Airport
5:59 PM
ATL
7:29 PM
ONT
S M T W T F S -
F92017
St. Louis Lambert International Airport
2:27 PM
STL
4:03 PM
LAS
- - - W T F -Search -
F94757
Harry Reid Intl. Airport
11:20 AM
LAS
12:29 PM
ONT
S M T W T F S -
F92017
St. Louis Lambert International Airport
2:27 PM
STL
4:03 PM
LAS
- - - W T F -Search -
F91283
Harry Reid Intl. Airport
6:20 AM
LAS
7:23 AM
ONT
S M T W T - S -
F94567
St. Louis Lambert International Airport
7:29 PM
STL
8:58 PM
DEN
S M T - T F SSearch -
F91261
Denver International Airport
7:40 AM
DEN
9:00 AM
ONT
S M T W T F S -
F93641
St. Louis Lambert International Airport
9:29 PM
STL
11:29 PM
LAS
S - - - T F SSearch -
F94757
Harry Reid Intl. Airport
11:20 AM
LAS
12:29 PM
ONT
S M T W T F S -
F92017
St. Louis Lambert International Airport
2:27 PM
STL
4:03 PM
LAS
- - - W T F -Search -
F94205
Harry Reid Intl. Airport
5:32 PM
LAS
6:41 PM
ONT
S - T W T F - -
F92017
St. Louis Lambert International Airport
2:27 PM
STL
4:03 PM
LAS
- - - W T F -Search -
F91357
Harry Reid Intl. Airport
3:08 PM
LAS
4:19 PM
ONT
S M T W T F S
St. Louis Lambert International Airport to Ontario International Airport Flights Info
| Flight distance | 2,485.2 km |
|---|---|
| Cheapest one-way ticket price | NZD 128 |
| Cheapest return ticket price | NZD 461 |
FAQs for St. Louis Lambert International Airport to Ontario International Airport Flights
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How long is a flight from St. Louis Lambert International Airport to Ontario International Airport?
It takes around 6 hours 5 minutes to fly from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT). -
How many daily flights are there from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT)?
There are around 1 daily flights from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT). -
When are flight tickets from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT) the cheapest?
Tickets cost around NZD 341 in June, making it the cheapest month to book. St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT) is a popular route, so don't forget to book your tickets in advance. -
When are flight tickets from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT) most expensive?
The route from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT) is quite popular. Without considering departure times or holidays, tickets cost around NZD 341 in June, the most expensive month to book this route. -
What time does the earliest flight from St. Louis Lambert International Airport to Ontario International Airport depart?
The earliest flight departs from St. Louis Lambert International Airport (STL) at 05:25 and arrives in Ontario International Airport (ONT) at 08:40. -
What time does the latest flight from St. Louis Lambert International Airport to Ontario International Airport depart?
The latest flight departs from St. Louis Lambert International Airport (STL) at 17:36 and arrives in Ontario International Airport (ONT) at 21:23. -
What is the transportation method from the main airport to downtown in Los Angeles?
- The distance from Los Angeles Intl. Airport to downtown is about 19 km. It takes about 30 minutes by taxi.
- The distance from Ontario International Airport to downtown is about 59 km. It takes about 1 hour 10 minutes by taxi.
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Which airline operates the most direct flights from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT)?
Southwest Airlines is a very popular airline operating an average of 44 flights per month.