$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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ONT
Aug 22 — Aug 291
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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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 23, 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 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 9/81:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Fri 9/112:55 pm
ONT
- BWI
2 stops22h 17m
Frontier
Deal found 7/21![Frontier logo]()
$239
This Frontier deal was found by Cheapflights users on 7/20. 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
Thu 8/279:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/20![Frontier logo]()
$242
This Frontier deal was found by Cheapflights users on 7/22. 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
Tue 8/2510:59 am
ONT
- BWI
1 stop30h 38m
Frontier
Deal found 7/22![Frontier logo]()
$243
This Frontier deal was found by Cheapflights users on 7/19. 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.
Sat 9/51:24 pm
BWI
- ONT
1 stop21h 08m
Frontier
Fri 9/113:47 pm
ONT
- BWI
1 stop25h 38m
Frontier
Deal found 7/19![Frontier logo]()
$247
This Gotogate deal was found by Cheapflights users on 7/20. 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.
Sat 9/51:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Tue 9/810:59 am
ONT
- BWI
1 stop30h 26m
Frontier
Deal found 7/20![Frontier logo]()
$248
This Booking.com deal was found by Cheapflights users on 7/20. 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 8/251:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Tue 9/110:59 am
ONT
- BWI
1 stop30h 38m
Frontier
Deal found 7/20![Frontier logo]()
$250
This CheapOair deal was found by Cheapflights users on 7/23. 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.
Mon 8/174:44 pm
BWI
- ONT
1 stop29h 17m
Frontier
Fri 8/219:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/23![Frontier logo]()
$253
This Booking.com deal was found by Cheapflights users on 7/21. 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 8/271:24 pm
BWI
- ONT
1 stop21h 08m
Frontier
Sun 8/309:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/21![Frontier logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 8/181:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Tue 8/257:56 pm
ONT
- BWI
2 stops37h 28m
Frontier
Deal found 7/21![Frontier logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/251:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Tue 9/152:55 pm
ONT
- BWI
2 stops14h 34m
Frontier
Deal found 7/22![Frontier logo]()
$256
This CheapOair deal was found by Cheapflights users on 7/19. 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.
Sat 9/51:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Sun 9/133:47 pm
ONT
- BWI
1 stop25h 38m
Frontier
Deal found 7/19![Frontier logo]()
$257
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 23, 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 23, 2026.
This Delta deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:00 am
BWI
- ONT
1 stop8h 05m
Delta
Mon 10/55:15 pm
ONT
- BWI
1 stop10h 03m
Delta
Deal found 7/20![Delta logo]()
$401
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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 10/237:02 am
BWI
- ONT
1 stop9h 14m
Alaska Airlines
Sat 11/74:09 pm
ONT
- BWI
1 stop10h 31m
Alaska Airlines
Deal found 7/23![Alaska Airlines logo]()
$475
This Southwest deal was found by Cheapflights users on 7/20. 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 9/176:35 am
BWI
- ONT
2 stops9h 50m
Southwest
Sun 9/205:35 am
ONT
- BWI
2 stops10h 00m
Southwest
Deal found 7/20![Southwest logo]()
$480
This United Airlines deal was found by Cheapflights users on 7/20. 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.
Mon 8/174:18 pm
BWI
- ONT
1 stop7h 35m
United Airlines
Wed 8/265:00 am
ONT
- BWI
1 stop7h 12m
United Airlines
Deal found 7/20![United Airlines logo]()
$510
This Delta deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:00 am
BWI
- ONT
1 stop7h 42m
Delta
Mon 8/1010:00 pm
ONT
- BWI
1 stop8h 19m
Delta
Deal found 7/19![Delta logo]()
$489
This Southwest deal was found by Cheapflights users on 7/18. 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 8/1411:55 am
BWI
- ONT
2 stops10h 25m
Southwest
Wed 8/268:35 am
ONT
- BWI
2 stops8h 35m
Southwest
Deal found 7/18![Southwest logo]()
$499
This Alaska Airlines deal was found by Cheapflights users on 7/22. 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 10/166:15 pm
BWI
- ONT
2 stops24h 47m
Alaska Airlines
Sun 10/186:45 pm
ONT
- BWI
2 stops31h 35m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$522
This Southwest deal was found by Cheapflights users on 7/18. 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 8/176:35 am
BWI
- ONT
2 stops8h 25m
Southwest
Sun 8/235:35 am
ONT
- BWI
2 stops9h 20m
Southwest
Deal found 7/18![Southwest logo]()
$499
This Delta deal was found by Cheapflights users on 7/19. 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.
Fri 8/72:18 pm
BWI
- ONT
1 stop7h 12m
Delta
Thu 8/137:05 am
ONT
- BWI
1 stop7h 10m
Delta
Deal found 7/19![Delta logo]()
$523
This Delta deal was found by Cheapflights users on 7/21. 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 8/157:39 am
BWI
- ONT
1 stop7h 37m
Delta
Sat 8/227:05 am
ONT
- BWI
1 stop7h 46m
Delta
Deal found 7/21![Delta logo]()
$539
Last-minute flights from Baltimore to OntarioDiscover last-minute flight deals from Baltimore to Ontario. Data last updated July 23, 2026 and is based on user searches.
Discover last-minute flight deals from Baltimore to Ontario. Data last updated July 23, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 7/22. 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
Tue 8/2510:59 am
ONT
- BWI
1 stop30h 38m
Frontier
Deal found 7/22![Frontier logo]()
$243
This Booking.com deal was found by Cheapflights users on 7/20. 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 7/20![Frontier logo]()
$253
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 8/181:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Tue 8/257:56 pm
ONT
- BWI
2 stops37h 28m
Frontier
Deal found 7/21![Frontier logo]()
$255
This Frontier deal was found by Cheapflights users on 7/20. 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
Thu 8/279:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/20![Frontier logo]()
$242
This Gotogate deal was found by Cheapflights users on 7/22. 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.
Thu 8/201:24 pm
BWI
- ONT
1 stop21h 08m
Frontier
Thu 8/279:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/22![Frontier logo]()
$248
This Frontier deal was found by Cheapflights users on 7/20. 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.
Sat 8/221:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Fri 8/289:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/20![Frontier logo]()
$247
This CheapOair deal was found by Cheapflights users on 7/23. 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.
Sun 8/231:24 pm
BWI
- ONT
1 stop21h 08m
Frontier
Sat 8/2910:59 am
ONT
- BWI
1 stop30h 38m
Frontier
Deal found 7/23![Frontier logo]()
$258
This Booking.com deal was found by Cheapflights users on 7/20. 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 8/251:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Tue 9/110:59 am
ONT
- BWI
1 stop30h 38m
Frontier
Deal found 7/20![Frontier logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/251:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Tue 9/152:55 pm
ONT
- BWI
2 stops14h 34m
Frontier
Deal found 7/22![Frontier logo]()
$256
This Booking.com deal was found by Cheapflights users on 7/21. 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 8/271:24 pm
BWI
- ONT
1 stop21h 08m
Frontier
Sun 8/309:33 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 7/21![Frontier logo]()
$254
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 23, 2026.
Search for one-way flight options from Baltimore to Ontario. Find affordable one-way fares based on user searches. Data last updated July 23, 2026.
This Super.com deal was found by Cheapflights users on 7/20. 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.
Tue 8/181:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Deal found 7/20![Frontier logo]()
$119
This Frontier deal was found by Cheapflights users on 7/19. 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
Deal found 7/19![Frontier logo]()
$121
This Mytrip deal was found by Cheapflights users on 7/22. 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 9/11:24 pm
BWI
- ONT
1 stop8h 37m
Frontier
Deal found 7/22![Frontier logo]()
$122
This Mytrip deal was found by Cheapflights users on 7/18. 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 7/18![Frontier logo]()
$123
This Super.com deal was found by Cheapflights users on 7/22. 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 7/22![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/165:22 pm
BWI
- ONT
1 stop24h 15m
Frontier
Deal found 7/19![Frontier logo]()
$127
This Booking.com deal was found by Cheapflights users on 7/22. 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
Deal found 7/22![Frontier logo]()
$128
This Super.com deal was found by Cheapflights users on 7/20. 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 7/20![Frontier logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/219:32 pm
BWI
- ONT
2 stops29h 18m
Frontier
Deal found 7/22![Frontier logo]()
$131
This Flightnetwork deal was found by Cheapflights users on 7/20. 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.
Sun 8/301:24 pm
BWI
- ONT
1 stop21h 08m
Frontier
Deal found 7/20![Frontier logo]()
$132
This CheapOair deal was found by Cheapflights users on 7/23. 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.
Sat 9/195:22 pm
BWI
- ONT
1 stop24h 15m
Frontier
Deal found 7/23![Frontier logo]()
$133
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 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $239 (Kiwi.com) |
One-way from | $119 (Super.com) |
Popular in | July |
Cheapest in | February |
Average price | $553 |
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 23, 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
Wed 9/30
6:00 am-11:05 am
1 stop8h 05m
Ontario
Mon 10/5
5:15 pm-6:18 am
1 stop10h 03m
$401
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Fri 10/23
7:02 am-1:16 pm
1 stop9h 14m
Ontario
Sat 11/7
4:09 pm-5:40 am
1 stop10h 31m
$475
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Thu 9/17
6:35 am-1:25 pm
2 stops9h 50m
Ontario
Sun 9/20
5:35 am-6:35 pm
2 stops10h 00m
$480
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Mon 8/3
6:00 am-10:42 am
1 stop7h 42m
Ontario
Mon 8/10
10:00 pm-9:19 am
1 stop8h 19m
$489
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Fri 8/14
11:55 am-7:20 pm
2 stops10h 25m
Ontario
Wed 8/26
8:35 am-8:10 pm
2 stops8h 35m
$499
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Mon 8/17
6:35 am-12:00 pm
2 stops8h 25m
Ontario
Sun 8/23
5:35 am-5:55 pm
2 stops9h 20m
$499
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Mon 8/17
4:18 pm-8:53 pm
1 stop7h 35m
Ontario
Wed 8/26
5:00 am-3:12 pm
1 stop7h 12m
$510
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Fri 10/16
6:15 pm-4:02 pm
2 stops24h 47m
Ontario
Sun 10/18
6:45 pm-5:20 am
2 stops31h 35m
$522
Quickest round-trip
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Fri 8/7
2:18 pm-6:30 pm
1 stop7h 12m
Ontario
Thu 8/13
7:05 am-5:15 pm
1 stop7h 10m
$523
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Sat 8/15
7:39 am-12:16 pm
1 stop7h 37m
Ontario
Sat 8/22
7:05 am-5:51 pm
1 stop7h 46m
$539
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 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 July 23, 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.
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 23, 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.
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentDavid,Aug 2023
BWI - SAN
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Food
7.0
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
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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 23, 2026.
Baltimore and Ontario flights
Browse other Baltimore and Ontario flight options. Last updated on July 23, 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 23, 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$344 | Average$477 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$346 | Average$473 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$460 | Average$544 | FlexibilityNo cancel fee | On-time71% |