$124 Find Cheap Flights from Baltimore to Ontario - Compare and Save

Among airlines operating Baltimore to Ontario flights:

• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Flights from Baltimore to Ontario usually depart from Baltimore/Washington (BWI) and arrive at Ontario (ONT).

Here are some options for this route, based on selected ticket types and cabin classes:

• Southwest: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Two cabin classes are available on flights from Baltimore to Ontario:

• Economy Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $322 round-trip via Houston George Bush Intcntl (IAH), compared to $544 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$90 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737-800 Passenger/BBJ2 (winglets) family is used most often on this route, operated mainly by Southwest and Hawaiian Airlines. Other aircraft seen on the route include Boeing 737 MAX 8 variants.

One-stop flights from Baltimore to Ontario most commonly connect through:

• Dallas/Fort Worth (DFW) - 23% of one-stop connections
• Denver Intl (DEN) - 21% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 18% of one-stop connections
• Salt Lake City (SLC) - 12% of one-stop connections

Dallas/Fort Worth (DFW) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 12% on the Baltimore to Ontario route. Tuesday is the cheapest departure day at $432 round-trip on average, while Sunday is the most expensive at $488, a difference of $56. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Some of the most popular sights in Ontario are Ontario Convention Center, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

Last-minute fares on this route - booked within 2 weeks of departure - run 6% above the route average of $461. Book 13 weeks before departure for the lowest fares.

A nonstop flight from Baltimore to Ontario takes 0h 00m, covering 2,276 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $252 to $2,163. That means the highest observed fare was about 9x higher than the lowest one.

One-way fares from Baltimore to Ontario are currently lower than usual. Average one-way flight prices are about $191, which is 28% below the typical average for this route.

Flying via Las Vegas Harry Reid Intl (LAS) gives the shortest average 1-stop total travel time at 7h 02m, compared with 7h 11m via Chicago Midway (MDW) and 7h 23m via Phoenix Sky Harbor Intl (PHX).

Ontario is 3 hours behind Baltimore (Pacific Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
· Fox
· Thrifty
· Europcar
· Dollar
· Alamo

Round-trip flights from Baltimore to Ontario range from $385 to $563, with an average of $461 over the past 12 months. Anything below $385 counts as a good deal.