$128+ Cheap flights from Ontario to Baltimore (ONT - BWI)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BWI
Oct 11 — Oct 181
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Baltimore with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Ontario to Baltimore/Washington are usually found in February or January, booked 24 days in advance, depart on a Wednesday or Monday and return on a Thursday
Cheap flight deals from Ontario to Baltimore
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to BaltimoreExplore the most affordable flight options available from Ontario to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2026.
Explore the most affordable flight options available from Ontario to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:33 pm -
1 stop14h 35m
Mon 11/22:07 pm -
1 stop29h 31m
Deal found 9/10![Frontier logo]()
$235
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:03 pm -
1 stop12h 30m
Mon 11/22:07 pm -
1 stop8h 01m
Deal found 9/10![Frontier logo]()
$252
This Booking.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:03 pm -
1 stop11h 55m
Thu 10/222:16 pm -
1 stop7h 49m
Deal found 9/6![Frontier logo]()
$258
This Booking.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:45 pm -
1 stop22h 45m
Wed 10/712:45 pm -
1 stop8h 31m
Deal found 9/10![Frontier logo]()
$259
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/238:03 pm -
1 stop12h 30m
Wed 10/2811:07 am -
1 stop8h 31m
Deal found 9/10![Frontier logo]()
$267
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:45 pm -
1 stop22h 45m
Sun 10/45:42 pm -
1 stop27h 06m
Deal found 9/10![Frontier logo]()
$282
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:03 pm -
1 stop11h 55m
Mon 11/22:07 pm -
1 stop8h 01m
Deal found 9/10![Frontier logo]()
$287
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:25 am -
2 stops15h 08m
Tue 11/1710:45 am -
2 stops16h 06m
Deal found 9/10![Frontier logo]()
$293
This CheapOair deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:45 pm -
1 stop22h 45m
Sun 10/45:42 pm -
1 stop27h 06m
Deal found 9/7![Frontier logo]()
$297
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/238:03 pm -
1 stop12h 30m
Thu 10/292:07 pm -
1 stop8h 01m
Deal found 9/10![Frontier logo]()
$302
Best flights from Ontario to BaltimoreDiscover carefully curated flight deals from Ontario to Baltimore that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2026.
Discover carefully curated flight deals from Ontario to Baltimore that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2026.
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:07 am -
1 stop7h 20m
Sat 10/176:00 am -
1 stop8h 06m
Deal found 9/7![Delta logo]()
$395
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:30 am -
2 stops9h 15m
Sat 10/176:25 am -
1 stop7h 45m
Deal found 9/10![Southwest logo]()
$400
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:00 am -
1 stop7h 27m
Tue 10/208:05 am -
1 stop10h 17m
Deal found 9/10![United Airlines logo]()
$505
This Alaska Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:02 am -
1 stop9h 06m
Sat 10/37:02 am -
1 stop9h 14m
Deal found 9/6![Alaska Airlines logo]()
$531
This Southwest deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/175:45 am -
2 stops8h 25m
Tue 10/203:05 pm -
2 stops8h 45m
Deal found 9/8![Southwest logo]()
$405
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/510:00 pm -
1 stop8h 16m
Sun 10/116:00 am -
1 stop8h 06m
Deal found 9/10![Delta logo]()
$498
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:00 am -
1 stop7h 42m
Tue 10/611:55 am -
2 stops12h 03m
Deal found 9/9![United Airlines logo]()
$510
This Southwest deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/224:15 pm -
2 stops10h 30m
Tue 10/273:05 pm -
2 stops8h 45m
Deal found 9/8![Southwest logo]()
$473
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/55:00 am -
2 stops11h 09m
Tue 11/106:10 am -
3 stops17h 05m
Deal found 9/10![United Airlines logo]()
$521
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/161:24 pm -
1 stop7h 20m
Mon 10/193:04 pm -
1 stop9h 55m
Deal found 9/10![United Airlines logo]()
$528
This Southwest deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/285:15 am -
2 stops11h 20m
Sat 10/32:25 pm -
2 stops9h 35m
Deal found 9/6![Southwest logo]()
$541
Last-minute flights from Ontario to BaltimoreDiscover last-minute flight deals from Ontario to Baltimore. Data last updated September 11, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Baltimore. Data last updated September 11, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:45 pm -
1 stop22h 45m
Wed 10/712:45 pm -
1 stop8h 31m
Deal found 9/10![Frontier logo]()
$259
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:45 pm -
1 stop22h 45m
Sun 10/45:42 pm -
1 stop27h 06m
Deal found 9/10![Frontier logo]()
$282
This CheapOair deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:45 pm -
1 stop22h 45m
Sun 10/45:42 pm -
1 stop27h 06m
Deal found 9/7![Frontier logo]()
$297
This Booking.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:03 pm -
1 stop11h 55m
Thu 10/222:16 pm -
1 stop7h 49m
Deal found 9/6![Frontier logo]()
$258
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:03 pm -
1 stop12h 30m
Wed 10/2811:07 am -
1 stop8h 31m
Deal found 9/10![Frontier logo]()
$252
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:03 pm -
1 stop11h 55m
Tue 11/311:07 am -
1 stop8h 31m
Deal found 9/10![Frontier logo]()
$287
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/238:03 pm -
1 stop12h 30m
Wed 10/2811:07 am -
1 stop8h 31m
Deal found 9/10![Frontier logo]()
$267
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/238:03 pm -
1 stop12h 30m
Thu 10/292:07 pm -
1 stop8h 01m
Deal found 9/10![Frontier logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:33 pm -
1 stop14h 35m
Mon 11/22:07 pm -
1 stop29h 31m
Deal found 9/10![Frontier logo]()
$235
One-way flights from Ontario to BaltimoreSearch for one-way flight options from Ontario to Baltimore. Find affordable one-way fares based on user searches. Data last updated September 11, 2026.
Search for one-way flight options from Ontario to Baltimore. Find affordable one-way fares based on user searches. Data last updated September 11, 2026.
This Super.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/28:03 pm -
1 stop12h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$128
This Super.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:03 pm -
1 stop11h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$130
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:46 pm -
1 stop13h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$132
This Frontier deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:03 pm -
1 stop12h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:25 am -
2 stops28h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$140
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:46 pm -
1 stop12h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$147
This Super.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/46:45 pm -
1 stop22h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2911:45 am -
2 stops47h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$156
This Frontier deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:15 am -
2 stops11h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$157
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:15 am -
2 stops31h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:15 am -
2 stops28h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$164
Find flight deals from Ontario to Baltimore
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Baltimore (BWI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $197 (Kiwi.com) |
One-way from | $128 (Super.com) |
Popular in | June |
Cheapest in | February |
Average price | $465 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Baltimore that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 11, 2026.
Use the filters below to find and compare flights from Ontario to Baltimore that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Sat 10/24
5:03 pm-5:45 am
1 stop9h 42m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$198
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Sat 11/14
5:04 pm-5:40 am
1 stop9h 36m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$208
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Wed 11/11
12:18 pm-12:58 am
1 stop9h 40m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$208
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Sat 1/23
6:53 pm-10:02 am
2 stops12h 09m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$258
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Thu 10/29
5:00 am-7:03 pm
2 stops11h 03m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$258
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Thu 12/31
7:05 am-6:18 pm
1 stop8h 13m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$266
Quickest round-trip
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Sat 9/19
11:00 am-8:25 pm
1 stop6h 25m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$299
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Sat 9/26
7:05 am-5:26 pm
1 stop7h 21m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$304
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Thu 3/4
7:00 am-5:03 pm
1 stop7h 03m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$310
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Sat 3/6
7:00 am-5:03 pm
1 stop7h 03m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$310
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Ontario to Baltimore
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Baltimore in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Ontario-Baltimore flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Baltimore flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Baltimore flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Baltimore flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Baltimore flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Baltimore
Have a flexible travel schedule? Discover the best time to fly to Baltimore from Ontario with our price prediction graph.
ONT-BWI
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Baltimore
Prices
More
How far ahead should I book a flight from Ontario to Baltimore?
The best time to book flights from Ontario to Baltimore is 23 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Ontario to Baltimore?
Currently, February is the cheapest month in which you can book a flight from Ontario to Baltimore (average of $363). Flying from Ontario to Baltimore in June is currently the most expensive (average of $550). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Ontario to Baltimore?
Airfare is below average for this route at the moment.
Ontario to Baltimore flights typically cost between $357 and $603 in October.The cheapest round-trip price found within the last 5 days was $197 on Frontier (Oct 27-Nov 2).
What’s the top layover airport for flights from Ontario to Baltimore?
Share of 1-stop round-trip flights from Ontario to Baltimore chosen by Cheapflights users in the past 12 months, using the same layover each way.
Houston (IAH) – chosen by Cheapflights users on 50% of 1-stop itineraries from Ontario to Baltimore on Cheapflights.
What’s the cheapest layover airport for flights from Ontario to Baltimore?
Average round-trip fare for 1-stop flights from Ontario to Baltimore, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Houston (IAH) is the most affordable 1-stop option, with an average round-trip price of $258.
What’s the fastest layover option from Ontario to Baltimore?
Shortest average travel time for 1-stop one-way flights from Ontario to Baltimore, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Dallas (DFW) have the shortest average one-way travel time for 1-stop routes: 8h 13m.
Which airport typically offers the quickest layover for flights from Ontario to Baltimore?
Average layover duration for 1-stop one-way flights from Ontario to Baltimore, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Houston (HOU) offer the fastest connection on this route, with an average layover time of 1h 45m.
Reviews of airlines servicing Baltimore
Get insights into the airlines that provide service to Baltimore. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Baltimore. Reviews last updated September 11, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from Ontario to Baltimore. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Related info for your journey
Find useful and relevant information for your journey from Ontario to Baltimore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Ontario and Baltimore flights
Browse other Ontario and Baltimore flight options. Last updated on September 11, 2026.
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Top 6 airlines flying from Ontario to Baltimore
Discover the top 6 airlines that operate flights from Ontario to Baltimore. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$183 | Average$441 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$221 | Average$320 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$256 | Average$393 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$351 | Average$476 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$361 | Average$464 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$434 | Average$513 | FlexibilityNo cancel fee | On-time71% |