$124+ Cheap flights from Baltimore to Ontario (BWI - ONT)
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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ONT
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Find cheap flights from Baltimore to Ontario 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.Cheap flight deals from Baltimore to Ontario
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Cheapest flights from Baltimore to OntarioExplore the most affordable flight options available from Baltimore to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
Explore the most affordable flight options available from Baltimore to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 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.
Fri 10/21:29 pm -
1 stop30h 17m
Tue 10/65:31 pm -
1 stop15h 09m
Deal found 9/10![Frontier logo]()
$204
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.
Wed 10/2811:07 am -
1 stop8h 31m
Mon 11/28:03 pm -
1 stop12h 05m
Deal found 9/9![Frontier logo]()
$252
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/222:16 pm -
1 stop7h 49m
Thu 10/298:03 pm -
1 stop11h 49m
Deal found 9/7![Frontier logo]()
$254
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 10/15:42 pm -
1 stop27h 06m
Mon 10/56:45 pm -
1 stop22h 45m
Deal found 9/10![Frontier logo]()
$262
This Frontier deal was found by Cheapflights users on 9/5. 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 11/62:07 pm -
1 stop8h 01m
Mon 11/98:03 pm -
1 stop12h 05m
Deal found 9/5![Frontier logo]()
$267
This Frontier deal was found by Cheapflights users on 9/5. 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 10/11:29 pm -
1 stop8h 10m
Sun 10/47:46 pm -
1 stop13h 14m
Deal found 9/5![Frontier logo]()
$272
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:45 pm -
1 stop8h 31m
Sun 10/46:45 pm -
1 stop22h 45m
Deal found 9/8![Frontier logo]()
$278
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 10/162:16 pm -
1 stop7h 52m
Mon 10/198:03 pm -
1 stop12h 30m
Deal found 9/10![Frontier logo]()
$287
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.
Thu 10/15:42 pm -
1 stop27h 06m
Wed 10/77:11 pm -
1 stop12h 47m
Deal found 9/9![Frontier logo]()
$288
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 11/1110:45 am -
2 stops16h 06m
Tue 11/176:25 am -
2 stops14h 57m
Deal found 9/10![Frontier logo]()
$293
Best flights from Baltimore to OntarioDiscover carefully curated flight deals from Baltimore to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
Discover carefully curated flight deals from Baltimore to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
This Frontier deal was found by Cheapflights users on 9/5. 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 11/62:07 pm -
1 stop8h 01m
Mon 11/98:03 pm -
1 stop12h 05m
Deal found 9/5![Frontier logo]()
$267
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.
Sat 10/176:00 am -
1 stop8h 06m
Mon 10/1911:08 pm -
1 stop7h 08m
Deal found 9/10![Delta logo]()
$395
This Gotogate deal was found by Cheapflights users on 9/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:15 pm -
1 stop19h 02m
Mon 10/266:45 pm -
2 stops19h 27m
Deal found 9/5![Alaska Airlines logo]()
$520
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/811:45 am -
1 stop8h 50m
Mon 10/1211:55 pm -
2 stops9h 20m
Deal found 9/7![Southwest logo]()
$536
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/125:48 pm -
1 stop8h 11m
Thu 10/1510:10 pm -
1 stop7h 35m
Deal found 9/8![American Airlines logo]()
$558
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/47:51 am -
1 stop9h 56m
Mon 12/74:00 pm -
1 stop11h 21m
Deal found 9/7![Alaska Airlines logo]()
$531
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.
Thu 11/196:00 am -
1 stop8h 08m
Fri 11/277:05 am -
1 stop9h 44m
Deal found 9/7![Delta logo]()
$575
This Southwest deal was found by Cheapflights users on 9/5. 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.
Fri 10/161:05 pm -
2 stops11h 15m
Sun 10/1811:55 pm -
2 stops9h 40m
Deal found 9/5![Southwest logo]()
$575
This Frontier deal was found by Cheapflights users on 9/5. 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 9/298:19 am -
2 stops11h 27m
Fri 10/22:30 pm -
2 stops15h 55m
Deal found 9/5![Frontier logo]()
$578
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.
Fri 12/47:51 am -
1 stop9h 56m
Tue 12/84:00 pm -
1 stop11h 21m
Deal found 9/6![Alaska Airlines logo]()
$531
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:02 am -
1 stop9h 14m
Wed 10/142:13 pm -
1 stop12h 07m
Deal found 9/7![Alaska Airlines logo]()
$537
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:15 pm -
2 stops24h 47m
Sun 10/256:02 am -
1 stop20h 18m
Deal found 9/7![Alaska Airlines logo]()
$559
Last-minute flights from Baltimore to OntarioDiscover last-minute flight deals from Baltimore to Ontario. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Baltimore to Ontario. Data last updated September 10, 2026 and is based on user searches.
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:45 pm -
1 stop8h 31m
Sun 10/46:45 pm -
1 stop22h 45m
Deal found 9/8![Frontier logo]()
$278
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 10/15:42 pm -
1 stop27h 06m
Mon 10/56:45 pm -
1 stop22h 45m
Deal found 9/10![Frontier logo]()
$262
This Frontier deal was found by Cheapflights users on 9/5. 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 10/11:29 pm -
1 stop8h 10m
Sun 10/47:46 pm -
1 stop13h 14m
Deal found 9/5![Frontier logo]()
$272
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.
Thu 10/15:42 pm -
1 stop27h 06m
Wed 10/77:11 pm -
1 stop12h 47m
Deal found 9/9![Frontier logo]()
$288
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.
Fri 10/21:29 pm -
1 stop30h 17m
Tue 10/65:31 pm -
1 stop15h 09m
Deal found 9/10![Frontier logo]()
$204
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 10/162:16 pm -
1 stop7h 52m
Mon 10/198:03 pm -
1 stop12h 30m
Deal found 9/10![Frontier logo]()
$287
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/222:16 pm -
1 stop7h 49m
Thu 10/298:03 pm -
1 stop11h 49m
Deal found 9/7![Frontier logo]()
$254
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 10/2710:45 am -
2 stops16h 06m
Tue 11/36:25 am -
2 stops14h 57m
Deal found 9/9![Frontier logo]()
$293
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.
Wed 10/2811:07 am -
1 stop8h 31m
Mon 11/28:03 pm -
1 stop12h 05m
Deal found 9/9![Frontier logo]()
$252
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/302:07 pm -
1 stop8h 01m
Mon 11/28:03 pm -
1 stop12h 05m
Deal found 9/6![Frontier logo]()
$267
One-way flights from Baltimore to OntarioSearch for one-way flight options from Baltimore to Ontario. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
Search for one-way flight options from Baltimore to Ontario. Find affordable one-way fares based on user searches. Data last updated September 10, 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.
Wed 9/3012:45 pm -
1 stop8h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$124
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/11:29 pm -
1 stop8h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$125
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/92:07 pm -
1 stop8h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$126
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:42 pm -
1 stop27h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$128
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/62:07 pm -
1 stop8h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$141
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:24 am -
2 stops44h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$144
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.
Wed 10/76:38 am -
2 stops20h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$150
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.
Sun 10/45:42 pm -
1 stop27h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$152
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 10/209:12 pm -
2 stops16h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$153
Find flight deals from Baltimore to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Baltimore (BWI) to Ontario (ONT). 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 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $204 (Kiwi.com) |
One-way from | $124 (Super.com) |
Popular in | July |
Cheapest in | November |
Average price | $456 |
Cheapflights Fare Finder
Customize your flight search to find flights from Baltimore to Ontario 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 10, 2026.
Use the filters below to find and compare flights from Baltimore to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
BaltimoreOntario
BWI Baltimore/Washington - ONT Ontario
BWIONT
Baltimore/Washington
Sat 11/14
9:40 am-2:10 pm
1 stop7h 30m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$198
BaltimoreOntario
BWI Baltimore/Washington - ONT Ontario
BWIONT
Baltimore/Washington
Fri 12/4
7:51 am-2:47 pm
1 stop9h 56m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$221
BaltimoreOntario
BWI Baltimore/Washington - ONT Ontario
BWIONT
Baltimore/Washington
Fri 10/23
7:45 am-2:10 pm
1 stop9h 25m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$221
BaltimoreOntario
BWI Baltimore/Washington - ONT Ontario
BWIONT
Baltimore/Washington
Sun 9/27
5:42 pm-5:48 pm
1 stop27h 06m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$231
BaltimoreOntario
BWI Baltimore/Washington - ONT Ontario
BWIONT
Baltimore/Washington
Fri 10/16
6:00 am-11:06 am
1 stop8h 06m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$248
BaltimoreOntario
BWI Baltimore/Washington - ONT Ontario
BWIONT
Baltimore/Washington
Wed 11/11
6:10 am-6:01 pm
3 stops14h 51m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$263
BaltimoreOntario
BWI Baltimore/Washington - ONT Ontario
BWIONT
Baltimore/Washington
Thu 12/3
7:51 am-2:47 pm
1 stop9h 56m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$266
BaltimoreOntario
BWI Baltimore/Washington - ONT Ontario
BWIONT
Baltimore/Washington
Tue 10/6
7:02 am-1:16 pm
1 stop9h 14m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$266
BaltimoreOntario
BWI Baltimore/Washington - ONT Ontario
BWIONT
Baltimore/Washington
Fri 11/6
2:07 pm-7:08 pm
1 stop8h 01m
Ontario
Mon 11/9
8:03 pm-11:08 am
1 stop12h 05m
$267
BaltimoreOntario
BWI Baltimore/Washington - ONT Ontario
BWIONT
Baltimore/Washington
Fri 10/23
3:04 pm-9:59 pm
1 stop9h 55m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$276
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Baltimore to Ontario
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 Baltimore to Ontario 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 Baltimore-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Baltimore-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Baltimore-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Baltimore-Ontario 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 Baltimore-Ontario 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 Baltimore to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Baltimore with our price prediction graph.
BWI-ONT
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 Baltimore to Ontario
Prices
More
What is the cheapest month to book a flight from Baltimore to Ontario?
Currently, November is the cheapest month in which you can book a flight from Baltimore to Ontario (average of $352). Flying from Baltimore to Ontario in July is currently the most expensive (average of $553). 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 BWI to ONT?
Find hourly flight availability from Baltimore to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 10, 2026.
It’s typically best to fly out from Baltimore to Ontario in the morning. Doing so could potentially save you 19% on the flight price compared to flying in the afternoon, which is usually more expensive.
What’s the top layover airport for flights from Baltimore to Ontario?
Share of 1-stop round-trip flights from Baltimore to Ontario 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 Baltimore to Ontario on Cheapflights.
What’s the cheapest layover airport for flights from Baltimore to Ontario?
Average round-trip fare for 1-stop flights from Baltimore to Ontario, 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 $359.
What’s the fastest layover option from Baltimore to Ontario?
Shortest average travel time for 1-stop one-way flights from Baltimore to Ontario, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 7h 18m.
Which airport typically offers the quickest layover for flights from Baltimore to Ontario?
Average layover duration for 1-stop one-way flights from Baltimore to Ontario, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 0h 52m.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated September 10, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Baltimore to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Food
7.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Food
7.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Food
7.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Food
7.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Food
7.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Related info for your journey
Find useful and relevant information for your journey from Baltimore to Ontario. 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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Alternative routes for Baltimore to Ontario
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Search flights from Baltimore to Ontario by cabin class
Find flights from Baltimore to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 10, 2026.
Baltimore and Ontario flights
Browse other Baltimore and Ontario flight options. Last updated on September 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from Baltimore to Ontario
Discover the top 5 airlines that operate flights from Baltimore to Ontario. 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 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$192 | Average$450 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$211 | Average$352 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$344 | Average$479 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$352 | Average$475 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$460 | Average$546 | FlexibilityNo cancel fee | On-time71% |