$164 Cheap Delta flights Ontario (ONT) to Baltimore (BWI)

View $164 flight on Thu, Aug 28, 2025Opens in a new window

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$164 Cheap Delta flights Ontario (ONT) to Baltimore (BWI)

Prices were available within the past 7 days and start at $164 for one-way flights and $308 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Aug 28 - Mon, Sep 1
ONT
Ontario
BWI
Baltimore
$308 Roundtrip, just found
$308
Roundtrip
just found
Select Delta flight, departing Thu, Aug 28 from Ontario to Baltimore, returning Mon, Sep 1, priced at $308 just found
Delta
Thu, Aug 28 - Mon, Sep 1
ONT
Ontario
BWI
Baltimore
$327 Roundtrip, just found
$327
Roundtrip
just found
Select Delta flight, departing Thu, Aug 28 from Ontario to Baltimore, returning Mon, Sep 1, priced at $327 just found
Flights from Ontario (ONT) to Baltimore (BWI)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Baltimore Washington Intl. Thurgood Marshall
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Popular airline
Southwest Airlines
Distance
2277 mi
Average flight time
7 hours 52 mins

Frequently asked questions

How much is a Delta Air Lines flight from Los Angeles - Ontario Intl. Airport (ONT) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Use the "Price (lowest to highest)" filter on Expedia to find cheap Delta Air Lines round-trip flights from $308 from ONT to BWI. Affordable one-way fares from $164 are also on offer.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from ONT to BWI with Delta Air Lines?
January is one of the cheapest months to fly to Baltimore with Delta Air Lines. You could also find great prices on one-way and round-trip fares in February.
What is the cheapest time to book flights from Los Angeles - Ontario Intl. Airport (ONT) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) with Delta Air Lines?
To find cheap Delta Air Lines fares from Los Angeles - Ontario Intl. Airport (ONT) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI), start searching one to three months before your planned departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact the overall cost. Sunday is usually the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your trip on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Delta Air Lines fly nonstop from Los Angeles - Ontario Intl. Airport (ONT) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Use our "Nonstop" filter when searching for direct Delta Air Lines flights from ONT to BWI. You can also compare other airlines offering the same nonstop route.
What is the earliest Delta Air Lines flight from ONT to BWI?
To find the earliest departure from ONT to BWI with Delta Air Lines, filter your search by "Morning" and "Early Morning." Choosing an early flight usually means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Delta Air Lines fly into in Baltimore?
Delta Air Lines flights from Los Angeles - Ontario Intl. Airport (ONT) to Baltimore land at Baltimore Washington Intl. Thurgood Marshall Airport (BWI). This is the main entry point to this city.
Why fly with Delta Air Lines from ONT to BWI?
Delta Air Lines makes traveling from ONT to BWI more comfortable with an excellent in-flight experience and a rewarding loyalty program. You could even start collecting points with Delta SkyMiles. Don't forget to join Expedia's free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Delta Air Lines flight from Los Angeles - Ontario Intl. Airport (ONT) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Changes are typically free within 24 hours of making your booking, but your airline may charge you after that time. For further details about altering your reservation, check out your "Trips," select your flight and click on "Manage Booking." If you want the flexibility to adjust your plans without being charged, tick the "Changes included" and "No cancel fee" filters when organizing your next getaway.

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