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BWI - ONT

$69 Find cheap flights from Baltimore to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Baltimore to Ontario departing on 5/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Fri 5/24
Fri 5/31

Search hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Baltimore to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Baltimore to Ontario, as well as popular online travel agencies
In the last 7 days travelers have searched 44,979,812 times on KAYAK, and here is why:

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Cheap flight deals from Baltimore to Ontario (BWI-ONT)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Baltimore to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
12:01 pm - 5:00 pmBWI-ONT
7h 59m1 stop
12:55 am - 12:00 pmONT-BWI
8h 05m1 stop
$149Frontier
Find Deal
Thu, May 9 - Fri, May 10
12:29 pm - 11:59 pmBWI-ONT
14h 30m1 stop
12:59 am - 3:16 pmONT-BWI
11h 17m2 stops
$154Frontier
Find Deal
Wed, May 1 - Tue, May 7
12:29 pm - 11:59 pmBWI-ONT
14h 30m1 stop
12:59 am - 11:29 amONT-BWI
7h 30m1 stop
$158Frontier
Find Deal
Wed, May 1 - Tue, May 7
12:29 pm - 11:59 pmBWI-ONT
14h 30m1 stop
12:55 am - 12:00 pmONT-BWI
8h 05m1 stop
$160Frontier
Find Deal
Wed, May 1 - Fri, May 3
12:01 pm - 5:00 pmBWI-ONT
7h 59m1 stop
12:59 am - 11:33 amONT-BWI
7h 34m1 stop
$166Frontier
Find Deal
Thu, May 9 - Thu, May 16
12:01 pm - 5:00 pmBWI-ONT
7h 59m1 stop
12:59 am - 11:33 amONT-BWI
7h 34m1 stop
$169Frontier
Find Deal
Thu, May 9 - Sun, May 19
1:00 pm - 11:59 pmBWI-ONT
13h 59m1 stop
7:16 am - 11:29 amONT-BWI
25h 13m1 stop
$170Frontier
Find Deal
Sat, May 4 - Tue, May 7
12:29 pm - 11:59 pmBWI-ONT
14h 30m1 stop
6:01 pm - 10:11 amONT-BWI
13h 10m1 stop
$174Frontier
Find Deal
Wed, May 1 - Thu, May 2
1:00 pm - 11:59 pmBWI-ONT
13h 59m1 stop
7:16 am - 3:16 pmONT-BWI
29h 00m2 stops
$175Frontier
Find Deal
Sat, May 4 - Tue, May 7
12:29 pm - 11:59 pmBWI-ONT
14h 30m1 stop
6:00 am - 5:59 pmONT-BWI
8h 59m1 stop
Wed, May 8 - Wed, May 29

Flights from Baltimore to Ontario - Travel Insights & Trends

Get data-powered insights and trends into flights from Baltimore to Ontario to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Baltimore to Ontario?

The average price of all flights from Baltimore to Ontario clicked on KAYAK for each day over the last 12 months.
When flying from Baltimore to Ontario, you should consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to Baltimore, you’ll find the best rates on Saturdays and the most expensive ones on Mondays.

What is the cheapest month to fly from Baltimore to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Baltimore to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Baltimore to Ontario is September, where tickets cost $249 on average. On the other hand, the most expensive months are March and June, where the average cost of tickets is $516 and $511 respectively.

How far in advance should I book a flight from Baltimore to Ontario?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Baltimore to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Baltimore to Ontario, you should book around 4 days before departure. For the absolute cheapest price, our data suggests you should book 57 days before departure.

Good to know

Low season

May

High season

November

Cheapest flight

$69
Best time to beat the crowds but there is an average 27% increase in price.
Most popular time to fly with an average 6% increase in price.
Flight from Baltimore to Ontario

When to book flights from Baltimore to Ontario

Are your dates flexible? Find out the best times to travel from Baltimore to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Baltimore to Ontario

  • What is the cheapest flight from Baltimore to Ontario?

    In the last 3 days, the lowest price for a flight from Baltimore to Ontario was $69 for a one-way ticket and $149 for a round-trip.

  • Do I need a passport to fly between Baltimore and Ontario?

    No, a passport isn't needed to fly from Baltimore to Ontario. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Baltimore to Ontario?

    Baltimore and Ontario are both served by 1 main airport. You will leave Baltimore from Baltimore/Washington and will be arriving at Ontario.

  • Which aircraft models fly most regularly from Baltimore to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Baltimore to Ontario?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Baltimore and Ontario, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Baltimore to Ontario, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Baltimore to Ontario are Delta and United Airlines. With an average price for the route of $427 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $559 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Baltimore to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Baltimore to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Baltimore to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Baltimore is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Baltimore to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Baltimore with another airline. Booking your flights between Baltimore and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Baltimore to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Baltimore up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from Baltimore to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Baltimore to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Baltimore to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 11004 reviews
8.6crew
8.2boarding
8.0entertainment
7.9comfort
7.5food
Airline reviews

There was a loud squeaky sound the whole time we were flying.

6.0 GoodEliza, Apr 2024SAN - LAX
Read more about Delta reviews

There was a loud squeaky sound the whole time we were flying.

Had a broken tray in business class. Crew just shrugged it off.

I didn’t like that I could not select my seat and was assigned a seat when I checked in at LAX

Great experience overall. Check in at Austin was congested as they only have about 6 check in kiosks, one was broken, and there was a lot of Spring Break travelers.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Everything was very good other than I had selected a specific seat when I booked the flight and they changed it once I checked-in the day before my flight. I was still in first class but lost my aisle seat for a window seat. Being tall, the aisle offers more comfort so I always select an aisle seat.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Crew was not friendly when I went to request a seat change.

My sister and I paid to have our seats and have them next to each other. I heard one of the employees say to the other one that you shouldn’t have given away reserved seats away to other passengers, and so I guess that is what happened because I got the last most uncomfortable seat in the plane even though I paid to sit in the middle of the plane with my sister. Terrible Experience !!

Really impressive staff at airport and on plane, especially given how busy it was

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

On time every leg of the journey and exceptional staff at counter, gate, and on board. I haven’t travelled in US for a long time and was genuinely surprised how pleasant this was.

This was a Lufthansa flight. Disappointing main meal. Very rough over Canada and arrival at FRA. IFE was almost unusable.

Too many fees (but that seems to apply to all airlines nowadays)

For a 22 minute flight all you expect is for it to be safe and comfortable

I was not able to buy food in the flight. They refer to include your Credit card in the APP, and if you are not from USA (i have a credit card form Canada) it is not possible

Over two hours wait to get wheelchair assistance from arrival to the departure gate for LA was unreasonable even though there appreared to be heavy demand.

Airline did not explain reasons why flight was delayed two hours. Explanations were badly needed and rarely provided. Problem seemed to clearly be the airline’s fault and not the fault of the weather or airport.

I was delighted that we were able to get on the 4:40 pm flight rather than our original booking at 6:55 pm!! Other than that, the flight was comfortable and landed early😊

The flight and crew were fine. The entertainment- the sound was so bad through the headphones I could barely understand it and it was a show I had seen before. The food might have been fine but having to have an account with united in order to access the app in order to pay for the food was rage inducing. I had entered my credit card info at home and logged in as guest but that wouldn’t allow the “wallet” tab to open in the app. And then the wifi was so bad that it took about 45 minutes to fully log in and get all the info working at which time I missed the food. You shouldn’t have to give your address, email and phone number in order to get a hamburger.

Fight crew was not very attentive and the bastions were gross!

Our flight was great we left Kona earlier and got into LAX almost an 1hour earlier as well. LAX AA is in repair so to get out and found our bus to get pick up was a bit confusing.

Plane was good but was delayed. probably not AA fault but caused a 1 hour delay. Seating was cramped.

5 hour flight - full flight - not enough room to use my computer - slightly delayed - Admirals club was excellent quality food, drink made up for flight seating. No food offerred on flight, you ahd to prebook.

We experience delays on departure and connecting flights resulting in 14 hour to our next departure. We were accommodated with a night's stay but was only provided a 12 dollar meals accommodation. The airlines rules state.at least 50 dollars. In any case, it can not make up for the whole day missed on our vacation in Sydney Australia.

I can say I will not be taking this airline again any time soon. Seat were uncomfortable and too tight. Lack of chair screen and little overhead space.

Plane felt so crowded and tightly packed. The chair itself was not comfortable.

They attended to my needs as I couldn't walk and they provided a wheelchair for me.q

Poor availability of food. Cold cabin temperature. Extremely long waiting time for a flight attendant to respond to a call button signal.

2.5h delay due to unruly passenger in first class. Had to be removed from the flight. No food unless pre ordered. Didn't know we would need it because of delay.

They charged me 212.00 for a heavy check in bag at the gate. The pricing and process was so confusing - as if it was designed to purposefully gouge customers who need to board plane. That experience combined with the outrageous price charged will prevent me from ever flying Spirit again. And I’ll be sure to tell the story to anyone who cares to hear.

The text told me it was changed to Terminal E and Gate D5. But with no one on site to ask questions there was confusion on where to go as all the gates were E's. Then we took the skyline to the D area. We left to get something to eat. No announcement was made but my daughter happened to asked and they told her our gate was moved to D12. I will not fly Spirit again.

The agent at the check in desk was absolutely rude. The rest of the team after that was good, but the check in process at LAS was miserable. The woman at the desk spoke like we were stupid and was rude throughout the process.

Its so random that they only allow 40 pounds on checked bags when all airlines take 55. They then charge you for each 10 extra pounds, so my checked suitcase was $130 and the flight $30 ... its like whattt, im for sure not traveling with Spirit again

Was not able to board the flight due to a horrible policy that I needed to be at the gate 1 hour before departure. I lost money on this and the connecting flight due to having to book on another airline. I was flying to Florida for my mother's cancer surgery in the afternoon.

So bad. The check in process was laborious and the check in agent didn't seem to know how to manage the process efficiently and was confused about how to check in my son's sports equipment. The baggage fees were outrageous and so expensive. $90 for a carry on bag? And $200 additional for 2 check ins. The security lines were insanely long and the terminal was not very nice in the Spirit area. $5 for a water on board. It was my first and last time flying Spirit - I tried to save $ by flying them due to the accommodating schedule but I should have paid for Southwest, because it would've actually ended up less expensive due to the free bags with Southwest. There were no charging ports on the airplane, no wifi and really uncomfortable seating. The flight crew were great though, courteous and efficient in their boarding. Flight was delayed 1 hour, but we made up 15 minutes in flight.

My experience was better than expected. What I did find not so great was the seats. Very little room, they did not recline and the tray table was the size of a post card. There was no food to try, just standard snacks that you had to pay for and I don’t know of any entertainment. I would fly again even though everything was an upcharge. Flight was on time with little disturbance

Great flight on time and kept us informed about our flight situation!!

thy don't even ofer water we have to buy it for $4.49 and paid for our cary on bags $100 each we never will fly in this company again.

Super cool and laid back, three lovely ladies. Couldn’t ask for better service.

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Flight was OK. Seats were good no cell phone charges on the plane no TVs or entertainment.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

Flight cancelled and was told by a rude gate agent that they don’t accommodate on other airlines. Had to wait 5 hours for a connecting flight that had a 7 hour layover. Would not allow bags to be checked early so we couldn’t go through security .Had to rent a car for the afternoon to store bags and get a meal. Also incurred a hotel fee. No apology or reason given for the cancellation- just rudeness.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

Not have to pay for every single item to take a flight. Seating and delays sucked.

Flight was cancelled and I had to spend the night in the airport lugging my suitcase around

If you don’t check in 24 hours in advance, they will charge you $110 to check your bag instead of the $30. I did not get an email with this information and did not check in. In addition, my flight home was cancelled at layover and I had to spend the night in the airport, and then have another layover at another airport before making it home. Will not fly frontier again.

Book cheap flights from Baltimore to Ontario

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Baltimore to Ontario found on KAYAK in the last 72 hours.
5/9Thu
1 stopFrontier
7h 59mBWI-ONT
$69
5/9Thu
1 stopFrontier
7h 59mBWI-ONT
$74
8/13Tue
1 stopDelta
7h 03mBWI-ONT
$199
6/12Wed
2 stopsSouthwest
13h 40mBWI-ONT
$208
8/8Thu
1 stopDelta
7h 03mBWI-ONT
$219
6/12Wed
1 stopSouthwest
7h 10mBWI-ONT
$221
5/9Thu
2 stopsAmerican Airlines
9h 52mBWI-ONT
$237
5/16Thu
1 stopAmerican Airlines
7h 35mBWI-ONT
$239
5/14Tue
1 stopUnited Airlines
7h 40mBWI-ONT
$249
6/7Fri
1 stopUnited Airlines
7h 15mBWI-ONT
$303

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Last minute flights from Baltimore to Ontario

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Baltimore to Ontario that are departing in the next 10 days.
4/27Sat
multi-stopFrontier
20h 31mBWI-ONT
4/28Sun
multi-stopFrontier
8h 01mONT-BWI
$184
4/27Sat
multi-stopFrontier
20h 31mBWI-ONT
4/28Sun
multi-stopFrontier
11h 17mONT-BWI
$189
4/26Fri
multi-stop
14h 26mBWI-ONT
5/1Wed
multi-stop
9h 50mONT-BWI
$494
4/27Sat
multi-stop
13h 59mBWI-ONT
5/1Wed
multi-stop
9h 50mONT-BWI
$529
4/27Sat
multi-stopDelta
9h 02mBWI-ONT
4/30Tue
multi-stopDelta
14h 19mONT-BWI
$700
4/29Mon
multi-stopUnited Airlines
7h 26mBWI-ONT
5/8Wed
multi-stopUnited Airlines
6h 53mONT-BWI
$716
4/27Sat
multi-stopAmerican Airlines
13h 37mBWI-ONT
5/1Wed
multi-stopAmerican Airlines
7h 15mONT-BWI
$720
4/27Sat
multi-stopAmerican Airlines
11h 53mBWI-ONT
5/1Wed
multi-stopAmerican Airlines
9h 55mONT-BWI
$725
4/25Thu
multi-stopDelta
8h 22mBWI-ONT
4/27Sat
multi-stopDelta
14h 08mONT-BWI
$747
4/28Sun
multi-stopUnited Airlines
7h 12mBWI-ONT
4/30Tue
multi-stopUnited Airlines
17h 20mONT-BWI
$788

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Baltimore - Ontario Flights

Departure:

Baltimore (BWI)United States

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - Baltimore

Cabin classes: