The cheapest times to fly from ONT to BWI are
- January 1st to February 25th
- April 23rd to May 6th
- August 13th to November 18th
- early December
based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from ONT to BWI is late October to early November. Prices can be as high as $1086 for Sunday flights during late March, or as low as $308 for Tuesday flights around late October to early November.
When to Fly to Baltimore
Flying from Ontario, CA (ONT) to Baltimore, MD (BWI) will usually cost between $334 to $684 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late October to early November with an average ticket price of $343. Due to high demand the most expensive time to fly is late March, with an average price of $651. Planning your trip to low-cost times can easily save you $308 on economy flights and even more on first-class flights. Generally, any price below $392 can be considered a good price for a round-trip ONT to BWI flight.
See below for a graph of average weekly prices for the ONT to BWI route. All prices are for round-trip tickets in USD.
Compared to other flights, the ONT to BWI flight is much cheaper than the average and costs much less than the average flight leaving from Ontario. The average price per mile (for a direct flight) is $0.11, which is far below average.
Flight Prices by Day of the Week
Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $186 (34%) on this flight.
Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $368. Return trip prices are from the BWI to ONT flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
Return Trip Prices by Day
Nonstop Flights and Layovers
Travelers looking to fly from ONT to BWI can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 5 hour 5 minutes may not be realistic.
Flight Questions Answered
Still have questions about flying from ONT to BWI? We’ve got answers.
Which airlines fly this route?
You can find 7 major airlines flying this route most often: Alaska, American, Delta, Frontier, JetBlue, Southwest, United, and potentially more during busy seasons.
How far away is it from Baltimore/Washington International Thurgood Marshall Airport to Ontario International Airport?
The distance between the two airports is roughly 2277 miles or 3664 kilometers.
How long does it take to fly from ONT to BWI?
The real-world flight time for a nonstop ONT to BWI flight is about 5 hour 5 minutes.
How many flights go between Ontario, CA and Baltimore, MD?
It depends on the day of the week and the date, but a typical day might have around 86 available flights from ONT to BWI.
Airport Location Info
|Origination airport name||Ontario International Airport|
|Country||the United States|
|Destination airport name||Baltimore/Washington International Thurgood Marshall Airport|
|Country||the United States|
Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.