Find out what a flight from Saint Louis to Ontario might cost

Prices vary based on date, airline, and availability. Compare several options if you're flying between Saint Louis and Ontario.

$69 is the best price recorded in the last 15 days.

Try shifting your departure forward or backward by a day to find better options. If you’re looking for a good deal, consider flying outside peak hours as well.

Which airports near Saint Louis or Ontario offer flights?

In many cases, using a nearby airport can improve your chances of finding direct flights or better rates.

• Airports in Saint Louis: Only Saint Louis - Lambert is currently operating.
• Airports in Ontario: Ontario is the only airport in use at the moment.

Secondary airports can offer faster travel thanks to shorter lines and quicker boarding times than major ones.

Plan smarter: flights from Saint Louis to Ontario

Find the flight that fits your plans with Jetcost. You can filter results by stops, agencies, budget, time of day, and airline — all in one search.

Other popular destinations

Travelers flying to United States also checked out: Las Vegas, Los Angeles, Miami, New York City, Orlando.

Comparing offers from multiple agencies helps you find the best price for the same route. You can also spot exclusive deals from individual airlines right in the results list.