$111+ Cheap flights from Ontario to Baltimore (ONT - BWI)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BWI
Sep 13 — Sep 201
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 16 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 August 14, 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 August 14, 2026.
This Frontier deal was found by Cheapflights users on 8/10. 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 9/167:11 pm -
1 stop13h 29m
Thu 9/241:29 pm -
1 stop8h 10m
Deal found 8/10![Frontier logo]()
$232
This Frontier deal was found by Cheapflights users on 8/13. 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 9/287:46 pm -
1 stop12h 54m
Mon 10/51:29 pm -
1 stop8h 10m
Deal found 8/13![Frontier logo]()
$233
This Frontier deal was found by Cheapflights users on 8/13. 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 9/97:11 pm -
1 stop13h 29m
Fri 9/111:29 pm -
1 stop8h 10m
Deal found 8/13![Frontier logo]()
$237
This Frontier deal was found by Cheapflights users on 8/11. 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 8/319:33 am -
1 stop8h 04m
Wed 9/21:24 pm -
1 stop8h 37m
Deal found 8/11![Frontier logo]()
$238
This Frontier deal was found by Cheapflights users on 8/12. 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 8/319:33 am -
1 stop8h 04m
Sat 9/51:24 pm -
1 stop8h 37m
Deal found 8/12![Frontier logo]()
$239
This CheapOair deal was found by Cheapflights users on 8/13. 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 9/176:45 pm -
1 stop22h 45m
Sat 9/195:42 pm -
1 stop27h 06m
Deal found 8/13![Frontier logo]()
$242
This Frontier deal was found by Cheapflights users on 8/12. 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 8/319:33 am -
1 stop8h 04m
Tue 9/11:24 pm -
1 stop8h 37m
Deal found 8/12![Frontier logo]()
$245
This Frontier deal was found by Cheapflights users on 8/9. 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.
Sun 9/137:46 pm -
1 stop13h 14m
Thu 9/241:29 pm -
1 stop8h 10m
Deal found 8/9![Frontier logo]()
$247
This Frontier deal was found by Cheapflights users on 8/13. 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 10/27:46 pm -
1 stop12h 54m
Sun 10/41:29 pm -
1 stop8h 10m
Deal found 8/13![Frontier logo]()
$252
This CheapOair deal was found by Cheapflights users on 8/11. 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 10/223:57 pm -
1 stop25h 28m
Sun 11/15:22 pm -
1 stop24h 15m
Deal found 8/11![Frontier logo]()
$257
This Booking.com deal was found by Cheapflights users on 8/10. 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.
Fri 9/49:33 am -
1 stop8h 04m
Sun 9/61:24 pm -
1 stop21h 08m
Deal found 8/10![Frontier logo]()
$263
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 August 14, 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 August 14, 2026.
This Southwest deal was found by Cheapflights users on 8/13. 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 9/288:30 am -
2 stops11h 55m
Mon 10/53:40 pm -
2 stops11h 15m
Deal found 8/13![Southwest logo]()
$405
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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 12/164:00 pm -
1 stop11h 21m
Tue 1/57:51 am -
1 stop9h 56m
Deal found 8/11![Alaska Airlines logo]()
$415
This United Airlines deal was found by Cheapflights users on 8/14. 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 9/109:01 am -
2 stops10h 58m
Tue 9/155:35 pm -
1 stop8h 24m
Deal found 8/14![United Airlines logo]()
$472
This Delta deal was found by Cheapflights users on 8/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3010:00 pm -
1 stop8h 19m
Sat 9/56:00 am -
1 stop7h 42m
Deal found 8/9![Delta logo]()
$484
This Alaska Airlines deal was found by Cheapflights users on 8/12. 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.
Thu 9/2412:12 pm -
1 stop15h 18m
Tue 9/297:50 am -
1 stop9h 26m
Deal found 8/12![Alaska Airlines logo]()
$455
This United Airlines deal was found by Cheapflights users on 8/11. 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 10/156:00 am -
1 stop7h 27m
Tue 10/208:37 am -
2 stops14h 54m
Deal found 8/11![United Airlines logo]()
$478
This Alaska Airlines deal was found by Cheapflights users on 8/12. 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.
Thu 9/34:27 pm -
2 stops20h 13m
Wed 9/97:15 pm -
1 stop19h 01m
Deal found 8/12![Alaska Airlines logo]()
$474
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 12/306:00 am -
1 stop8h 17m
Mon 1/116:15 am -
1 stop9h 05m
Deal found 8/13![United Airlines logo]()
$525
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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 9/26:02 am -
1 stop21h 28m
Tue 9/157:50 am -
1 stop9h 26m
Deal found 8/11![Alaska Airlines logo]()
$503
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 9/301:52 pm -
2 stops17h 38m
Sat 10/35:29 pm -
1 stop8h 20m
Deal found 8/13![United Airlines logo]()
$527
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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 9/233:14 pm -
1 stop12h 16m
Tue 10/136:15 pm -
1 stop19h 02m
Deal found 8/11![Alaska Airlines logo]()
$516
This United Airlines deal was found by Cheapflights users on 8/13. 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 9/109:01 am -
2 stops10h 58m
Mon 9/143:04 pm -
1 stop9h 55m
Deal found 8/13![United Airlines logo]()
$531
Last-minute flights from Ontario to BaltimoreDiscover last-minute flight deals from Ontario to Baltimore. Data last updated August 14, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Baltimore. Data last updated August 14, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 8/11. 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 8/319:33 am -
1 stop8h 04m
Tue 9/11:24 pm -
1 stop8h 37m
Deal found 8/11![Frontier logo]()
$238
This Frontier deal was found by Cheapflights users on 8/12. 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 8/319:33 am -
1 stop8h 04m
Sat 9/51:24 pm -
1 stop8h 37m
Deal found 8/12![Frontier logo]()
$239
This Booking.com deal was found by Cheapflights users on 8/10. 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.
Fri 9/49:33 am -
1 stop8h 04m
Sun 9/61:24 pm -
1 stop21h 08m
Deal found 8/10![Frontier logo]()
$263
This Frontier deal was found by Cheapflights users on 8/13. 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 9/97:11 pm -
1 stop13h 29m
Fri 9/111:29 pm -
1 stop8h 10m
Deal found 8/13![Frontier logo]()
$237
This Frontier deal was found by Cheapflights users on 8/9. 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.
Sun 9/137:46 pm -
1 stop13h 14m
Thu 9/241:29 pm -
1 stop8h 10m
Deal found 8/9![Frontier logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Mon 9/148:11 pm -
1 stop12h 29m
Wed 9/163:10 pm -
2 stops22h 20m
Deal found 8/12![Frontier logo]()
$270
This Frontier deal was found by Cheapflights users on 8/10. 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 9/167:11 pm -
1 stop13h 29m
Wed 9/2312:45 pm -
1 stop8h 31m
Deal found 8/10![Frontier logo]()
$232
This CheapOair deal was found by Cheapflights users on 8/13. 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 9/176:45 pm -
1 stop22h 45m
Sat 9/195:42 pm -
1 stop27h 06m
Deal found 8/13![Frontier logo]()
$242
This Kiwi.com deal was found by Cheapflights users on 8/11. 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.
Fri 9/257:46 pm -
1 stop12h 54m
Mon 9/289:32 pm -
2 stops15h 58m
Deal found 8/11![Frontier logo]()
$276
This Frontier deal was found by Cheapflights users on 8/13. 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 9/287:46 pm -
1 stop12h 54m
Mon 10/51:29 pm -
1 stop8h 10m
Deal found 8/13![Frontier logo]()
$233
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 August 14, 2026.
Search for one-way flight options from Ontario to Baltimore. Find affordable one-way fares based on user searches. Data last updated August 14, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Fri 9/116:45 pm -
1 stop22h 45m
Deal found 8/13![Frontier logo]()
$111
This Super.com deal was found by Cheapflights users on 8/9. 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.
Fri 9/49:33 am -
1 stop8h 04m
Deal found 8/9![Frontier logo]()
$119
This Super.com deal was found by Cheapflights users on 8/13. 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.
Wed 9/97:11 pm -
1 stop13h 29m
Deal found 8/13![Frontier logo]()
$120
This Booking.com deal was found by Cheapflights users on 8/10. 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 9/246:45 pm -
1 stop22h 45m
Deal found 8/10![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 8/11. 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.
Mon 10/268:54 pm -
2 stops11h 13m
Deal found 8/11![Frontier logo]()
$124
This Booking.com deal was found by Cheapflights users on 8/13. 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.
Tue 9/110:59 am -
1 stop30h 38m
Deal found 8/13![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 8/11. 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 9/87:56 pm -
2 stops34h 29m
Deal found 8/11![Frontier logo]()
$130
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 August 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $232 (Frontier) |
One-way from | $111 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $464 |
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 2,558,603 searches. Data last updated August 14, 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
Mon 9/28
8:30 am-11:25 pm
2 stops11h 55m
Baltimore/Washington
Mon 10/5
3:40 pm-11:55 pm
2 stops11h 15m
$405
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Wed 12/16
4:00 pm-6:21 am
1 stop11h 21m
Baltimore/Washington
Tue 1/5
7:51 am-2:47 pm
1 stop9h 56m
$415
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Thu 9/24
12:12 pm-6:30 am
1 stop15h 18m
Baltimore/Washington
Tue 9/29
7:50 am-2:16 pm
1 stop9h 26m
$455
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Thu 9/10
9:01 am-10:59 pm
2 stops10h 58m
Baltimore/Washington
Tue 9/15
5:35 pm-10:59 pm
1 stop8h 24m
$472
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Thu 9/3
4:27 pm-3:40 pm
2 stops20h 13m
Baltimore/Washington
Wed 9/9
7:15 pm-11:16 am
1 stop19h 01m
$474
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Thu 10/15
6:00 am-4:27 pm
1 stop7h 27m
Baltimore/Washington
Tue 10/20
8:37 am-8:31 pm
2 stops14h 54m
$478
Quickest round-trip
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Sun 8/30
10:00 pm-9:19 am
1 stop8h 19m
Baltimore/Washington
Sat 9/5
6:00 am-10:42 am
1 stop7h 42m
$484
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Wed 9/2
6:02 am-6:30 am
1 stop21h 28m
Baltimore/Washington
Tue 9/15
7:50 am-2:16 pm
1 stop9h 26m
$503
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Wed 9/23
3:14 pm-6:30 am
1 stop12h 16m
Baltimore/Washington
Tue 10/13
6:15 pm-10:17 am
1 stop19h 02m
$516
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Wed 12/30
6:00 am-5:17 pm
1 stop8h 17m
Baltimore/Washington
Mon 1/11
6:15 am-12:20 pm
1 stop9h 05m
$525
Showing 1-10 of 24 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 August.
| 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 15 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.
What is the cheapest time of day to fly from ONT to BWI?
Find hourly flight availability from Ontario to Baltimore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2026.
When flying from Ontario to Baltimore, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
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 67% 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 Dallas (DFW) offer the fastest connection on this route, with an average layover time of 2h 37m.
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 August 14, 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.
Crew
8.6
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Crew
8.6
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Crew
8.6
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Crew
8.6
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Crew
8.6
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJoseph,Sep 2023
LAX - BWI
Crew
8.6
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
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
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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 2,558,603 searches. Data last updated August 14, 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$352 | 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% |