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Flights from Saint Louis to Ontario – Airlines & connecting routes

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STL to ONT flights and routes map STL to ONT – All flight route options from Saint Louis Airport, Missouri, USA to Ontario International Airport, California, USA. These flights are operated by 5 different airlines through 11 different connections. The shortest flight time is 5 hours and 50 minutes. See the full flight schedule and time table, including departure times, airlines and stopover details to find the best option for you.

From
To
USA STL Saint Louis Airport Saint Louis, MO, USA
USA ONT Ontario Airport, CA, USA
STL
Saint Louis Airport
USASaint Louis, MO, USA
Ontario Airport
USAOntario, CA, USA
ONT
No direct flights found
18 routes with 1 stop found »
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1 stop route options with the same airline:

Duration

Via Phoenix PHX
1 stop with American Airlines. 1-2 flights per day.

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5h 32m

Via Phoenix PHX
1 stop with American Airlines.
5h 32m
1-2 flights per day.
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Via Denver DEN
1 stop with United Airlines. 3-5 flights per day.

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5h 50m

Via Denver DEN
1 stop with United Airlines.
5h 50m
3-5 flights per day.
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Via Las Vegas LAS
1 stop with Frontier Airlines.
Begins in 11/10

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6h 07m

Begins in 11/10
Via Las Vegas LAS
1 stop with Frontier Airlines.
6h 07m
Begins in 11/10
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Via Denver DEN
1 stop with Frontier Airlines. 0-1 flights per day.

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6h 21m

Via Denver DEN
1 stop with Frontier Airlines.
6h 21m
0-1 flights per day.
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Via Dallas DFW
1 stop with American Airlines. 6-7 flights per day.

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6h 27m

Via Dallas DFW
1 stop with American Airlines.
6h 27m
6-7 flights per day.
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Via Dallas DFW
1 stop with Frontier Airlines. 0-1 flights per day.
Begins in 9/10

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6h 30m

Begins in 9/10
Via Dallas DFW
1 stop with Frontier Airlines.
6h 30m
0-1 flights per day.
Begins in 9/10
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Via Denver DEN
1 stop with Southwest Airlines. 2-6 flights per day.

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6h 30m

Via Denver DEN
1 stop with Southwest Airlines.
6h 30m
2-6 flights per day.
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Via Salt Lake City SLC
1 stop with Delta Air Lines. 2 flights per day.

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6h 47m

Via Salt Lake City SLC
1 stop with Delta Air Lines.
6h 47m
2 flights per day.
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Via Las Vegas LAS
1 stop with Southwest Airlines. 1-6 flights per day.

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6h 55m

Via Las Vegas LAS
1 stop with Southwest Airlines.
6h 55m
1-6 flights per day.
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Via Phoenix PHX
1 stop with Southwest Airlines. 0-5 flights per day.

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6h 55m

Via Phoenix PHX
1 stop with Southwest Airlines.
6h 55m
0-5 flights per day.
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Via Houston IAH
1 stop with United Airlines.
Only saturdays

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7h 04m

Only saturdays
Via Houston IAH
1 stop with United Airlines.
7h 04m
Only saturdays
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Via Dallas DAL
1 stop with Southwest Airlines. 0-2 flights per day.

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7h 05m

Via Dallas DAL
1 stop with Southwest Airlines.
7h 05m
0-2 flights per day.
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Via Chicago MDW
1 stop with Southwest Airlines. 0-1 flights per day.

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7h 20m

Via Chicago MDW
1 stop with Southwest Airlines.
7h 20m
0-1 flights per day.
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Via Austin AUS
1 stop with Southwest Airlines. 0-2 flights per day.
Tue,Wed & Fri

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8h 00m

Tue,Wed & Fri
Via Austin AUS
1 stop with Southwest Airlines.
8h 00m
0-2 flights per day.
Tue,Wed & Fri
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Via San Antonio SAT
1 stop with Southwest Airlines. 0-1 flights per day.
Begins in 7/8

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8h 30m

Begins in 7/8
Via San Antonio SAT
1 stop with Southwest Airlines.
8h 30m
0-1 flights per day.
Begins in 7/8
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Via Chicago ORD
1 stop with United Airlines. 2 flights per day.

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8h 46m

Via Chicago ORD
1 stop with United Airlines.
8h 46m
2 flights per day.
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1 stop route options with codeshare or different airlines:

Duration

Via Chicago ORD With American Airlines & United Airlines 0-1 flights per day.

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7h 47m

Via Chicago ORD
7h 47m
With American Airlines & United Airlines 0-1 flights per day.
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Via Dallas DFW With United Airlines & American Airlines
Begins in 2/12

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9h 28m

Begins in 2/12
Via Dallas DFW
9h 28m
With United Airlines & American Airlines
Begins in 2/12
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Find the best prices on hotels and car rental near Ontario Airport

We got great deals on hotels and car rentals near the airport.

Ontario Airport HOTEL PRICES
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Saint Louis to Ontario flights

There are over 11 airlines and as many as 209 flights every week to this destination. While flying to Ontario from Saint Louis you will be doing a stopover in Phoenix, Las Vegas or any other of the 11 alternatives with flight connections.

Are there any non-stop flights from STL to ONT?

There are no direct or non-stop flights from Saint Louis Airport, STL to Ontario International Airport, ONT.

Saint Louis to Ontario with United Airlines

If you fly to Ontario from Saint Louis with United Airlines you will do a stopover in Denver. United Airlines is a Star Alliance member.

Distance & flight times: Saint Louis Airport to Ontario International Airport

The shortest flight time between STL and ONT is 5 hours and 32 minutes.

ViaTotal flight timeLayover timeDistance
PHX Phoenix5h 32m25m1592 miles (2562 km)
LAS Las Vegas6h 7m1h 19m1573 miles (2531 km)
DEN Denver6h 21m1h 9m1594 miles (2565 km)
DFW Dallas6h 27m1h 11m1745 miles (2808 km)
SLC Salt Lake City6h 47m30m1720 miles (2767 km)
IAH Houston7h 4m1h 25m2010 miles (3234 km)
DAL Dallas7h 5m1h 40m1752 miles (2819 km)
MDW Chicago7h 20m2h 0m1964 miles (3160 km)
ORD Chicago7h 47m1h 8m1965 miles (3162 km)
AUS Austin8h 0m1h 35m1926 miles (3099 km)
SAT San Antonio8h 30m2h 25m1961 miles (3155 km)
The flight times and layover times in the table above are approximate and may vary depending on flight number, aircraft, airline, weather, and time of day.STL-ONT flight routesSaint Louis to Ontario flight routes illustrated on a map.
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Saint Louis - Ontario route map and flight paths
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The fastest way to fly from Saint Louis (STL) to Ontario (ONT) is via Phoenix and it will take about 5 hours and 32 minutes. The second fastest route is via Las Vegas and will take 6 hours and 7 minutes.

You can fly with American Airlines, Frontier Airlines, Delta Air Lines, United Airlines or Southwest Airlines from Saint Louis to Ontario.

The flight time between Saint Louis Airport (STL) and Ontario International Airport (ONT) via Phoenix Sky Harbor International, PHX is 5 hours and 32 minutes.

No. But you can still purchase a 1 stop flight via Phoenix, Las Vegas or any other route to Ontario (ONT).

A codeshare agreement means that cooperating airlines are able to sell seats on each other’s flights. This means that you are able to travel to more destinations than your airline of choice normally offers. Codeshare flights are also beneficial because of the seamless transits you can get with connecting flights from the same airline. The downside of choosing a codeshare flight can be that you in some cases can’t upgrade codeshare flights or use elite benefits.

A connecting or transit flight means that you reach your final destination through two or more flights – in other words a non-direct flight. You will change to a new aircraft after your first flight, this may include moving to another terminal at the airport aswell. The time required to transfer passengers and luggage between flights is called Minimum Connecting Time (MCT) and are always taken into account here on Flightroutes.com.

If you bought your whole flight on a single ticket, the airline will book you on the next available connecting flight.

With connecting flights, checked in luggage is most commonly forwarded to your final destination when buying a single ticket for both flights.

If you miss your connecting flight due to circumstances outside your control such as your first flight being delayed, you should turn to your airline who will provide you with a seat on the next available flight. This is usually done free of charge, and only applies if you purchased your trip as one ticket. If the next connecting flight is the following day, the airline usually provides accommodation and meals.
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