Cheap flights from Ontario to Washington, D.C. from $119

If you’re not able to fly to Baltimore in September, then February is your next best option. Flight prices from Ontario to Baltimore during February average around $363.

The cheapest day to depart from Ontario to Baltimore is on a Wednesday. Travelers who choose to depart for Baltimore on a Wednesday will often find tickets for as low as $398. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $513. These prices are subject to change though, so be sure to set up a Price Alert for flights to Baltimore.

Flying to Baltimore from Ontario in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $268 when looking at flights departing in the afternoon. Flights at noon are often more expensive with an average ticket price of $503.

Fly from Ontario to Baltimore/Washington for the best Ontario - Baltimore/Washington flight prices

You are more likely to see cheaper flights to Baltimore from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Baltimore for around $455 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Baltimore from Ontario for as low as $269 on momondo.

There is only 1 cabin class available to choose from on Ontario to Baltimore flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 24% on your flight if you consider stops on a Ontario to Baltimore flight.

As of June 2026, prices for Ontario to Baltimore flights are approximately 66% more expensive when compared to flights at the same time last year.

Frontier, Southwest, and Delta are the most popular carriers operating from Ontario to Baltimore/Washington

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Baltimore from Ontario according to our data. United Airlines is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Baltimore. Keep in mind that there are 8 different airlines that fly to Baltimore on a routine basis, so you have a few additional options to choose from.

As of June 2026, 1 flights take off from Ontario and land in Baltimore each day. The most common flight departure time for this route is 9:00PM, with 100% of daily flights taking off in the evening.

The number of flights available between Ontario and Baltimore is 7 per week as of June 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.