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Compare & reserve one-way or return flights from Baltimore to Ontario from 55 only to get the best flight deals and promotions for your BWI to ONT trip! Flights from Baltimore/Washington (BWI) to Ontario/LA (ONT) Book low fares from Baltimore/Washington (BWI) to Ontario/LA with Southwest Airlines .

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It’s easy to find the Baltimore/Washington International Airport/Thurgood Marshall to Ontario International Airport flight. Find airfare and ticket deals for cheap flights from Baltimore, MD to Ontario, CA. Search flight deals from various travel partners with one click at Cheap Flights from Baltimore, MD to Ontario, CA from 79 - BWI to ONT Tickets & Airfare Deals at The total flight duration time from Baltimore (BWI) to Ontario (ONT) is typically 9 hours 50 minutes.

This is the average non-stop flight time based upon historical flights for this route. During this period.