$119+ Cheap flights from Baltimore to Ontario (BWI - ONT)
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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ONT
Aug 11 — Aug 181
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
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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 July 12, 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 July 12, 2026.
This Frontier deal was found by Cheapflights users on 7/9. 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 8/191:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Mon 8/249:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/9![Frontier logo]()
$242
This Frontier deal was found by Cheapflights users on 7/9. 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.
Mon 8/174:44 pm
BWI
- ONT
1 stop29h 17m
Frontier
Mon 8/249:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/9![Frontier logo]()
$243
This Super.com deal was found by Cheapflights users on 7/11. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Mon 8/249:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/11![Frontier logo]()
$244
This Frontier deal was found by Cheapflights users on 7/8. 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.
Wed 8/191:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Fri 8/219:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/8![Frontier logo]()
$247
This Booking.com deal was found by Cheapflights users on 7/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/201:24 pm
BWI
- ONT
1 stop21h 08m
Frontier
Thu 8/279:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/8![Frontier logo]()
$248
This Flightnetwork deal was found by Cheapflights users on 7/8. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/64:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Mon 8/109:36 am
ONT
- BWI
1 stop7h 58m
Frontier
Deal found 7/8![Frontier logo]()
$249
This Booking.com deal was found by Cheapflights users on 7/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/54:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Wed 8/129:36 am
ONT
- BWI
1 stop7h 58m
Frontier
Deal found 7/8![Frontier logo]()
$250
This CheapOair deal was found by Cheapflights users on 7/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/201:24 pm
BWI
- ONT
1 stop21h 08m
Frontier
Tue 8/2510:59 am
ONT
- BWI
1 stop30h 38m
Frontier
Deal found 7/9![Frontier logo]()
$252
This Booking.com deal was found by Cheapflights users on 7/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:44 pm
BWI
- ONT
1 stop29h 17m
Frontier
Wed 8/2610:59 am
ONT
- BWI
1 stop30h 38m
Frontier
Deal found 7/7![Frontier logo]()
$254
This Booking.com deal was found by Cheapflights users on 7/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/74:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Mon 8/109:36 am
ONT
- BWI
1 stop7h 58m
Frontier
Deal found 7/8![Frontier logo]()
$255
This CheapOair deal was found by Cheapflights users on 7/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/74:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Thu 8/139:36 am
ONT
- BWI
1 stop7h 58m
Frontier
Deal found 7/8![Frontier logo]()
$257
This CheapOair deal was found by Cheapflights users on 7/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/74:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Fri 8/149:36 am
ONT
- BWI
1 stop7h 58m
Frontier
Deal found 7/8![Frontier logo]()
$262
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 July 12, 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 July 12, 2026.
This United Airlines deal was found by Cheapflights users on 7/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/263:04 pm
BWI
- ONT
1 stop9h 55m
United Airlines
Tue 9/296:00 am
ONT
- BWI
1 stop7h 27m
United Airlines
Deal found 7/8![United Airlines logo]()
$409
This Southwest deal was found by Cheapflights users on 7/7. 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.
Sat 11/710:55 am
BWI
- ONT
2 stops8h 25m
Southwest
Wed 11/118:45 am
ONT
- BWI
2 stops8h 20m
Southwest
Deal found 7/7![Southwest logo]()
$467
This Alaska Airlines deal was found by Cheapflights users on 7/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:00 am
BWI
- ONT
1 stop9h 21m
Alaska Airlines
Sun 10/1811:13 am
ONT
- BWI
1 stop15h 07m
Alaska Airlines
Deal found 7/10![Alaska Airlines logo]()
$511
This Southwest deal was found by Cheapflights users on 7/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/293:05 pm
BWI
- ONT
2 stops10h 05m
Southwest
Tue 8/44:45 pm
ONT
- BWI
2 stops10h 50m
Southwest
Deal found 7/11![Southwest logo]()
$476
This United Airlines deal was found by Cheapflights users on 7/11. 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.
Sat 8/228:10 am
BWI
- ONT
2 stops14h 51m
United Airlines
Tue 8/256:08 am
ONT
- BWI
2 stops10h 26m
United Airlines
Deal found 7/11![United Airlines logo]()
$483
This Alaska Airlines deal was found by Cheapflights users on 7/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:50 am
BWI
- ONT
1 stop9h 19m
Alaska Airlines
Tue 9/16:02 am
ONT
- BWI
1 stop9h 02m
Alaska Airlines
Deal found 7/8![Alaska Airlines logo]()
$514
This Southwest deal was found by Cheapflights users on 7/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/221:00 pm
BWI
- ONT
2 stops10h 05m
Southwest
Sun 8/305:35 am
ONT
- BWI
2 stops8h 10m
Southwest
Deal found 7/11![Southwest logo]()
$476
This United Airlines deal was found by Cheapflights users on 7/9. 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.
Wed 8/1910:25 am
BWI
- ONT
2 stops12h 36m
United Airlines
Fri 8/217:13 pm
ONT
- BWI
1 stop9h 02m
United Airlines
Deal found 7/9![United Airlines logo]()
$510
This Alaska Airlines deal was found by Cheapflights users on 7/7. 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.
Tue 8/114:19 pm
BWI
- ONT
1 stop10h 33m
Alaska Airlines
Wed 8/125:54 pm
ONT
- BWI
1 stop9h 33m
Alaska Airlines
Deal found 7/7![Alaska Airlines logo]()
$529
This Southwest deal was found by Cheapflights users on 7/8. 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.
Wed 12/169:10 am
BWI
- ONT
2 stops8h 55m
Southwest
Sat 1/25:00 am
ONT
- BWI
2 stops8h 15m
Southwest
Deal found 7/8![Southwest logo]()
$513
This Southwest deal was found by Cheapflights users on 7/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2610:50 am
BWI
- ONT
2 stops9h 00m
Southwest
Mon 11/302:00 pm
ONT
- BWI
2 stops7h 25m
Southwest
Deal found 7/11![Southwest logo]()
$554
Last-minute flights from Baltimore to OntarioDiscover last-minute flight deals from Baltimore to Ontario. Data last updated July 12, 2026 and is based on user searches.
Discover last-minute flight deals from Baltimore to Ontario. Data last updated July 12, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 7/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/54:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Wed 8/129:36 am
ONT
- BWI
1 stop7h 58m
Frontier
Deal found 7/8![Frontier logo]()
$250
This Flightnetwork deal was found by Cheapflights users on 7/8. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/64:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Mon 8/109:36 am
ONT
- BWI
1 stop7h 58m
Frontier
Deal found 7/8![Frontier logo]()
$249
This Booking.com deal was found by Cheapflights users on 7/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/74:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Mon 8/109:36 am
ONT
- BWI
1 stop7h 58m
Frontier
Deal found 7/8![Frontier logo]()
$255
This CheapOair deal was found by Cheapflights users on 7/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/74:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Thu 8/139:36 am
ONT
- BWI
1 stop7h 58m
Frontier
Deal found 7/8![Frontier logo]()
$257
This CheapOair deal was found by Cheapflights users on 7/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/74:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Fri 8/149:36 am
ONT
- BWI
1 stop7h 58m
Frontier
Deal found 7/8![Frontier logo]()
$262
This Super.com deal was found by Cheapflights users on 7/11. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Mon 8/249:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/11![Frontier logo]()
$244
This Frontier deal was found by Cheapflights users on 7/9. 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.
Mon 8/174:44 pm
BWI
- ONT
1 stop29h 17m
Frontier
Mon 8/249:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/9![Frontier logo]()
$243
This Booking.com deal was found by Cheapflights users on 7/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:44 pm
BWI
- ONT
1 stop29h 17m
Frontier
Wed 8/2610:59 am
ONT
- BWI
1 stop30h 38m
Frontier
Deal found 7/7![Frontier logo]()
$254
This Frontier deal was found by Cheapflights users on 7/9. 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 8/191:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Mon 8/249:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/9![Frontier logo]()
$242
This Frontier deal was found by Cheapflights users on 7/8. 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.
Wed 8/191:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Fri 8/219:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/8![Frontier logo]()
$247
This Booking.com deal was found by Cheapflights users on 7/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/201:24 pm
BWI
- ONT
1 stop21h 08m
Frontier
Thu 8/279:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/8![Frontier logo]()
$248
This CheapOair deal was found by Cheapflights users on 7/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/201:24 pm
BWI
- ONT
1 stop21h 08m
Frontier
Tue 8/2510:59 am
ONT
- BWI
1 stop30h 38m
Frontier
Deal found 7/9![Frontier logo]()
$252
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 July 12, 2026.
Search for one-way flight options from Baltimore to Ontario. Find affordable one-way fares based on user searches. Data last updated July 12, 2026.
This Super.com deal was found by Cheapflights users on 7/10. 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.
Wed 8/261:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Deal found 7/10![Frontier logo]()
$119
This Mytrip deal was found by Cheapflights users on 7/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/251:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Deal found 7/11![Frontier logo]()
$122
This Super.com deal was found by Cheapflights users on 7/9. 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 8/271:24 pm
BWI
- ONT
1 stop21h 08m
Frontier
Deal found 7/9![Frontier logo]()
$125
This Super.com deal was found by Cheapflights users on 7/8. 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.
Mon 8/104:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Deal found 7/8![Frontier logo]()
$126
This Expedia deal was found by Cheapflights users on 7/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:22 pm
BWI
- ONT
1 stop24h 15m
Frontier
Deal found 7/8![Frontier logo]()
$127
This Booking.com deal was found by Cheapflights users on 7/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/31:24 pm
BWI
- ONT
1 stop21h 08m
Frontier
Deal found 7/7![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 7/11. 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.
Thu 9/105:22 pm
BWI
- ONT
1 stop24h 15m
Frontier
Deal found 7/11![Frontier logo]()
$129
This Super.com deal was found by Cheapflights users on 7/9. 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.
Sun 8/231:24 pm
BWI
- ONT
1 stop21h 08m
Frontier
Deal found 7/9![Frontier logo]()
$130
This Expedia deal was found by Cheapflights users on 7/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/74:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Deal found 7/9![Frontier logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 7/8. 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.
Mon 10/59:52 pm
BWI
- ONT
2 stops21h 18m
Frontier
Deal found 7/8![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 10/139:29 pm
BWI
- ONT
2 stops29h 26m
Frontier
Deal found 7/11![Frontier logo]()
$139
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 July 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $242 (Frontier) |
One-way from | $119 (Super.com) |
Popular in | June |
Cheapest in | February |
Average price | $497 |
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 2,558,603 searches. Data last updated July 12, 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
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Sat 9/26
3:04 pm-9:59 pm
1 stop9h 55m
Ontario
Tue 9/29
6:00 am-4:27 pm
1 stop7h 27m
$409
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Sat 11/7
10:55 am-4:20 pm
2 stops8h 25m
Ontario
Wed 11/11
8:45 am-8:05 pm
2 stops8h 20m
$467
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Wed 7/29
3:05 pm-10:10 pm
2 stops10h 05m
Ontario
Tue 8/4
4:45 pm-6:35 am
2 stops10h 50m
$476
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Sat 8/22
1:00 pm-8:05 pm
2 stops10h 05m
Ontario
Sun 8/30
5:35 am-4:45 pm
2 stops8h 10m
$476
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Sat 8/22
8:10 am-8:01 pm
2 stops14h 51m
Ontario
Tue 8/25
6:08 am-7:34 pm
2 stops10h 26m
$483
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Wed 8/19
10:25 am-8:01 pm
2 stops12h 36m
Ontario
Fri 8/21
7:13 pm-7:15 am
1 stop9h 02m
$510
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Fri 10/16
7:00 am-1:21 pm
1 stop9h 21m
Ontario
Sun 10/18
11:13 am-5:20 am
1 stop15h 07m
$511
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Wed 12/16
9:10 am-3:05 pm
2 stops8h 55m
Ontario
Sat 1/2
5:00 am-4:15 pm
2 stops8h 15m
$513
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Mon 8/24
7:50 am-2:09 pm
1 stop9h 19m
Ontario
Tue 9/1
6:02 am-6:04 pm
1 stop9h 02m
$514
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Tue 8/11
4:19 pm-11:52 pm
1 stop10h 33m
Ontario
Wed 8/12
5:54 pm-6:27 am
1 stop9h 33m
$529
Showing 1-10 of 22 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 July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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
What is the cheapest month to book a flight from Baltimore to Ontario?
Currently, February is the cheapest month in which you can book a flight from Baltimore to Ontario (average of $371). Flying from Baltimore to Ontario in June is currently the most expensive (average of $546). 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 July 12, 2026.
It’s typically best to fly out from Baltimore to Ontario in the morning. Doing so could potentially save you 20% on the flight price compared to flying in the afternoon, which is usually more expensive.
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 July 12, 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.
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
7.9
Crew
8.6
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
7.9
Crew
8.6
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
7.9
Crew
8.6
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
7.9
Crew
8.6
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
7.9
Crew
8.6
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
7.9
Crew
8.6
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
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
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 July 12, 2026.
Baltimore and Ontario flights
Browse other Baltimore and Ontario flight options. Last updated on July 12, 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 2,558,603 searches. Data last updated July 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$192 | Average$450 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$211 | Average$268 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$222 | Average$450 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$346 | Average$467 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$460 | Average$505 | FlexibilityNo cancel fee | On-time71% |