$104+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ONT
Jul 8 — Jul 151
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.Cheapflights Tip: The best prices from Baltimore/Washington to Ontario are usually found in January or February, booked 42 days in advance, depart on a Tuesday or Thursday and return on a Tuesday
Cheap flight deals from Baltimore to Ontario
Cheapest
Best
Last-minute
One-way
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 June 8, 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 June 8, 2026.
This Gotogate deal was found by Cheapflights users on 6/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/45:36 pm
BWI
- ONT
1 stop16h 46m
Frontier
Fri 7/109:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/7![Frontier logo]()
$241
This Frontier deal was found by Cheapflights users on 6/7. 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 7/212:21 pm
BWI
- ONT
1 stop7h 27m
Frontier
Fri 7/109:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/7![Frontier logo]()
$242
This Frontier deal was found by Cheapflights users on 6/6. 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.
Mon 7/274:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Wed 8/59:36 am
ONT
- BWI
1 stop8h 03m
Frontier
Deal found 6/6![Frontier logo]()
$243
This Booking.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/45:36 pm
BWI
- ONT
1 stop16h 46m
Frontier
Sat 7/119:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/6![Frontier logo]()
$244
This Flightnetwork deal was found by Cheapflights users on 6/4. 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.
Fri 7/35:32 pm
BWI
- ONT
1 stop27h 20m
Frontier
Sat 7/119:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/4![Frontier logo]()
$251
This CheapOair deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/215:19 pm
BWI
- ONT
1 stop27h 33m
Frontier
Mon 8/315:43 pm
ONT
- BWI
1 stop23h 54m
Frontier
Deal found 6/7![Frontier logo]()
$252
This Booking.com deal was found by Cheapflights users on 6/7. 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.
Fri 7/244:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Tue 7/289:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/7![Frontier logo]()
$254
This CheapOair deal was found by Cheapflights users on 6/4. 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 8/215:19 pm
BWI
- ONT
1 stop27h 33m
Frontier
Tue 9/15:43 pm
ONT
- BWI
1 stop23h 54m
Frontier
Deal found 6/4![Frontier logo]()
$262
This Booking.com deal was found by Cheapflights users on 6/4. 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 7/224:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Mon 7/279:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/4![Frontier logo]()
$264
This Frontier deal was found by Cheapflights users on 6/7. 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 7/212:21 pm
BWI
- ONT
1 stop7h 27m
Frontier
Wed 7/159:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/7![Frontier logo]()
$296
This Booking.com deal was found by Cheapflights users on 6/4. 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 7/214:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Thu 7/239:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/4![Frontier logo]()
$297
This Booking.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/224:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Wed 7/299:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/6![Frontier logo]()
$298
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 June 8, 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 June 8, 2026.
This Southwest deal was found by Cheapflights users on 6/5. 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.
Sat 8/13:50 pm
BWI
- ONT
2 stops10h 05m
Southwest
Sat 8/87:05 am
ONT
- BWI
2 stops8h 40m
Southwest
Deal found 6/5![Southwest logo]()
$494
This Alaska Airlines deal was found by Cheapflights users on 6/4. 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.
Sat 7/184:19 pm
BWI
- ONT
1 stop10h 33m
Alaska Airlines
Tue 7/215:26 pm
ONT
- BWI
1 stop9h 15m
Alaska Airlines
Deal found 6/4![Alaska Airlines logo]()
$513
This Delta deal was found by Cheapflights users on 6/7. 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.
Tue 6/302:10 pm
BWI
- ONT
1 stop7h 20m
Delta
Wed 7/811:48 am
ONT
- BWI
1 stop9h 51m
Delta
Deal found 6/7![Delta logo]()
$557
This United Airlines deal was found by Cheapflights users on 6/3. 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.
Tue 8/2510:25 am
BWI
- ONT
2 stops13h 28m
United Airlines
Wed 8/265:00 am
ONT
- BWI
1 stop11h 34m
United Airlines
Deal found 6/3![United Airlines logo]()
$582
This Delta deal was found by Cheapflights users on 6/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/47:39 am
BWI
- ONT
1 stop7h 37m
Delta
Sun 8/3010:00 pm
ONT
- BWI
1 stop9h 57m
Delta
Deal found 6/6![Delta logo]()
$560
This Southwest deal was found by Cheapflights users on 6/7. 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.
Tue 6/236:50 am
BWI
- ONT
1 stop8h 50m
Southwest
Sat 6/273:00 pm
ONT
- BWI
2 stops11h 15m
Southwest
Deal found 6/7![Southwest logo]()
$562
This Southwest deal was found by Cheapflights users on 6/3. 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 7/2312:25 pm
BWI
- ONT
1 stop8h 10m
Southwest
Sun 7/269:40 pm
ONT
- BWI
Nonstop4h 50m
Southwest
Deal found 6/3![Southwest logo]()
$563
This Delta deal was found by Cheapflights users on 6/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/27:15 am
BWI
- ONT
1 stop7h 55m
Delta
Fri 8/2810:00 pm
ONT
- BWI
1 stop8h 58m
Delta
Deal found 6/6![Delta logo]()
$573
This KAYAK deal was found by Cheapflights users on 6/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/237:00 am
BWI
- ONT
3 stops13h 05m
Southwest
Thu 6/258:00 am
ONT
- BWI
1 stop12h 45m
Southwest
Deal found 6/5![Southwest logo]()
$567
This Southwest deal was found by Cheapflights users on 6/7. 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 7/115:30 pm
BWI
- ONT
2 stops8h 25m
Southwest
Sat 7/187:10 am
ONT
- BWI
2 stops11h 00m
Southwest
Deal found 6/7![Southwest logo]()
$567
Last-minute flights from Baltimore to OntarioDiscover last-minute flight deals from Baltimore to Ontario. Data last updated June 8, 2026 and is based on user searches.
Discover last-minute flight deals from Baltimore to Ontario. Data last updated June 8, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 6/3. 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.
Wed 7/15:32 pm
BWI
- ONT
1 stop27h 20m
Frontier
Wed 7/89:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/3![Frontier logo]()
$262
This Expedia deal was found by Cheapflights users on 6/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/212:21 pm
BWI
- ONT
1 stop7h 27m
Frontier
Sat 7/119:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/7![Frontier logo]()
$242
This Frontier deal was found by Cheapflights users on 6/7. 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 7/212:21 pm
BWI
- ONT
1 stop7h 27m
Frontier
Wed 7/159:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/7![Frontier logo]()
$296
This Flightnetwork deal was found by Cheapflights users on 6/4. 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.
Fri 7/35:32 pm
BWI
- ONT
1 stop27h 20m
Frontier
Sat 7/119:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/4![Frontier logo]()
$251
This Gotogate deal was found by Cheapflights users on 6/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/45:36 pm
BWI
- ONT
1 stop16h 46m
Frontier
Fri 7/109:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/7![Frontier logo]()
$241
This Booking.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/45:36 pm
BWI
- ONT
1 stop16h 46m
Frontier
Sat 7/119:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/6![Frontier logo]()
$244
This Booking.com deal was found by Cheapflights users on 6/4. 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 7/214:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Thu 7/239:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/4![Frontier logo]()
$297
This Booking.com deal was found by Cheapflights users on 6/4. 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 7/224:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Mon 7/279:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/4![Frontier logo]()
$264
This Booking.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/224:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Wed 7/299:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/6![Frontier logo]()
$298
This Booking.com deal was found by Cheapflights users on 6/7. 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.
Fri 7/244:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Tue 7/289:32 am
ONT
- BWI
1 stop8h 04m
Frontier
Deal found 6/7![Frontier logo]()
$254
This Frontier deal was found by Cheapflights users on 6/6. 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.
Mon 7/274:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Wed 8/59:36 am
ONT
- BWI
1 stop8h 03m
Frontier
Deal found 6/6![Frontier logo]()
$243
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 June 8, 2026.
Search for one-way flight options from Baltimore to Ontario. Find affordable one-way fares based on user searches. Data last updated June 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 9/16:57 pm
BWI
- ONT
2 stops18h 08m
Frontier
Deal found 6/3![Frontier logo]()
$104
This Frontier deal was found by Cheapflights users on 6/7. 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 7/212:21 pm
BWI
- ONT
1 stop7h 27m
Frontier
Deal found 6/7![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 8/39:37 pm
BWI
- ONT
2 stops53h 13m
Frontier
Deal found 6/4![Frontier logo]()
$126
This Expedia deal was found by Cheapflights users on 6/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/204:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Deal found 6/6![Frontier logo]()
$127
This Booking.com deal was found by Cheapflights users on 6/4. 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 7/35:32 pm
BWI
- ONT
1 stop27h 20m
Frontier
Deal found 6/4![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 8/319:32 pm
BWI
- ONT
2 stops29h 17m
Frontier
Deal found 6/3![Frontier logo]()
$130
This Mytrip deal was found by Cheapflights users on 6/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/84:44 pm
BWI
- ONT
1 stop17h 48m
Frontier
Deal found 6/7![Frontier logo]()
$131
This Mytrip deal was found by Cheapflights users on 6/7. 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 Mytrip 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 6/7![Frontier logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 8/49:37 pm
BWI
- ONT
2 stops29h 13m
Frontier
Deal found 6/4![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 7/289:37 pm
BWI
- ONT
2 stops39h 27m
Frontier
Deal found 6/3![Frontier logo]()
$136
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 June 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $241 (Gotogate) |
One-way from | $104 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $462 |
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 June 8, 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 8/1
3:50 pm-10:55 pm
2 stops10h 05m
Ontario
Sat 8/8
7:05 am-6:45 pm
2 stops8h 40m
$494
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Sat 7/18
4:19 pm-11:52 pm
1 stop10h 33m
Ontario
Tue 7/21
5:26 pm-5:41 am
1 stop9h 15m
$513
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Tue 6/30
2:10 pm-6:30 pm
1 stop7h 20m
Ontario
Wed 7/8
11:48 am-12:39 am
1 stop9h 51m
$557
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Tue 8/4
7:39 am-12:16 pm
1 stop7h 37m
Ontario
Sun 8/30
10:00 pm-10:57 am
1 stop9h 57m
$560
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Tue 6/23
6:50 am-12:40 pm
1 stop8h 50m
Ontario
Sat 6/27
3:00 pm-5:15 am
2 stops11h 15m
$562
Quickest round-trip
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Thu 7/23
12:25 pm-5:35 pm
1 stop8h 10m
Ontario
Sun 7/26
9:40 pm-5:30 am
Nonstop4h 50m
$563
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Tue 6/23
7:00 am-5:05 pm
3 stops13h 05m
Ontario
Thu 6/25
8:00 am-11:45 pm
1 stop12h 45m
$567
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Sat 7/11
5:30 pm-10:55 pm
2 stops8h 25m
Ontario
Sat 7/18
7:10 am-9:10 pm
2 stops11h 00m
$567
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Sun 8/2
7:15 am-12:10 pm
1 stop7h 55m
Ontario
Fri 8/28
10:00 pm-9:58 am
1 stop8h 58m
$573
BaltimoreOntario
BWI - ONT
BWIONT
Baltimore/Washington
Tue 8/25
10:25 am-8:53 pm
2 stops13h 28m
Ontario
Wed 8/26
5:00 am-7:34 pm
1 stop11h 34m
$582
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 June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | 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, January is the cheapest month in which you can book a flight from Baltimore to Ontario (average of $369). 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 June 8, 2026.
It’s typically best to fly out from Baltimore to Ontario in the morning. Doing so could potentially save you 26% 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 June 8, 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
Crew
8.6
Entertainment
7.5
Overall
7.9
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
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 June 8, 2026.
Baltimore and Ontario flights
Browse other Baltimore and Ontario flight options. Last updated on June 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Baltimore to Ontario
Discover the top 4 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 June 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$192 | Average$450 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$222 | Average$450 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$346 | Average$465 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$460 | Average$505 | FlexibilityNo cancel fee | On-time71% |