St. Louis to Ontario Flight tickets from INR 2,407

App

Customer Support

INR

Search Bookings

Flights from St. Louis to Ontario

Worldwide Coverage

Flights to over 5,000 cities

One-stop Service Guarantee

Price guaranteed upon confirmed payment, booking guaranteed once tickets issued

Secure Payment

Convenient & reliable booking and payment system

Book flight tickets from St. Louis to Ontario starting at INR 2,407

Whether you’re going for a one-way or round-trip to Ontario, we’ve got you covered! Check out these different flight options from St. Louis below.

One way
Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Find the best time to fly from St. Louis to Ontario

These price trend charts carefully monitor and predict how flight prices from St. Louis to Ontario will change. Keep a close eye on them to understand when the best time to buy your tickets is.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Airlines Flying from St. Louis to Ontario

Compare prices from various providers below to understand which option best suits your travel needs, before enjoying a comfortable journey with a trusted airline from St. Louis to Ontario.

Frontier Airlines

From INR 2,407

Delta Air Lines

From INR 10,336

Alaska Airlines

From INR 10,631

United Airlines

From INR 11,291

American Airlines

From INR 12,400

Southwest Airlines

From INR 12,967

ANA airlines

Find more flights and airlines

Alternative Routes from St. Louis to Ontario

Did you know that you can save money and time on an alternative route from St. Louis to Ontario? Check out some of the different available routes below.

Cheapest
STL
22:32
27h 7m
1 transfer
ONT
23:39
St.Louis Lambert International Airport - Ontario International Airport
Tue, Oct 29Frontier Airlines
INR 2,407
STL
22:32
27h 7m
1 transfer
ONT
23:39
St.Louis Lambert International Airport - Ontario International Airport
Tue, Oct 29Frontier Airlines
INR 2,407
Find More Flights

FAQ

When are flight tickets from St. Louis (STL) to Ontario (ONT) the cheapest?
Airlines adjust prices for flights from St. Louis to Ontario based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much do flights from St. Louis (STL) to Ontario (ONT) cost?
According to Trip.com's data, the lowest price is around INR 26,547.

How to find a cheap flight from St. Louis to Ontario

If you leave it until the last minute and forget to check some of the key information when booking tickets, prices can often end up skyrocketing. Below, you can find our top tips for getting the best value flights – from changing dates to chasing deals, there are plenty ways to keep your next trip affordable.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com

Flight Information from St. Louis to Ontario

Cheapest nonstop flight price	INR 2,406
Cheapest round-trip ticket price	INR 18,557
Off-season for travel	October
Peak season for travel	November
Flight distance	10,023.47 km
Popular airline	Frontier Airlines