$86+ Cheap flights from Ontario to Baltimore (ONT - BWI)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BWI
Mar 6 — Mar 131
1 adult, Economy
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Find cheap flights from Ontario to Baltimore with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Ontario to Baltimore/Washington are usually found in January or May, booked 71 days in advance, depart on a Tuesday or Thursday and return on a Friday
Cheap flight deals from Ontario to Baltimore
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to BaltimoreExplore the most affordable flight options available from Ontario to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 4, 2026.
Explore the most affordable flight options available from Ontario to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 4, 2026.
This Travelocity deal was found by Cheapflights users on 2/2. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/308:26 am
ONT
- BWI
1 stop23h 46m
Frontier
Tue 5/53:06 pm
BWI
- ONT
1 stop8h 33m
Frontier
Deal found 2/2![Frontier logo]()
$200
This Trip.com deal was found by Cheapflights users on 2/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/308:26 am
ONT
- BWI
1 stop23h 46m
Frontier
Wed 5/63:06 pm
BWI
- ONT
1 stop8h 33m
Frontier
Deal found 2/4![Frontier logo]()
$211
This Frontier deal was found by Cheapflights users on 2/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/117:40 pm
ONT
- BWI
1 stop10h 59m
Frontier
Sat 4/185:05 pm
BWI
- ONT
1 stop8h 37m
Frontier
Deal found 2/4![Frontier logo]()
$221
This American Airlines deal was found by Cheapflights users on 2/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/1410:56 am
ONT
- BWI
1 stop9h 03m
American Airlines
Tue 2/176:00 am
BWI
- ONT
1 stop10h 49m
American Airlines
Deal found 2/3![American Airlines logo]()
$231
This Expedia deal was found by Cheapflights users on 2/2. 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.
Wed 5/63:24 pm
ONT
- BWI
1 stop11h 20m
Multiple Airlines
Tue 5/123:06 pm
BWI
- ONT
1 stop8h 33m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$249
This Frontier deal was found by Cheapflights users on 2/1. 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 4/85:18 pm
ONT
- BWI
1 stop13h 06m
Frontier
Sun 4/1210:34 am
BWI
- ONT
1 stop11h 11m
Frontier
Deal found 2/1![Frontier logo]()
$255
This Frontier deal was found by Cheapflights users on 2/1. 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 4/117:40 pm
ONT
- BWI
1 stop10h 59m
Frontier
Tue 4/143:06 pm
BWI
- ONT
1 stop8h 33m
Frontier
Deal found 2/1![Frontier logo]()
$256
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2910:15 pm
ONT
- BWI
1 stop8h 22m
Delta
Thu 5/711:50 am
BWI
- ONT
1 stop9h 46m
Delta
Deal found 2/3![Delta logo]()
$257
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1710:15 pm
ONT
- BWI
2 stops10h 26m
Delta
Sat 4/257:00 am
BWI
- ONT
1 stop7h 36m
Delta
Deal found 2/4![Delta logo]()
$262
This Expedia deal was found by Cheapflights users on 2/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/13:26 pm
ONT
- BWI
1 stop11h 18m
Multiple Airlines
Tue 5/53:06 pm
BWI
- ONT
1 stop8h 33m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$273
This Frontier deal was found by Cheapflights users on 2/2. 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 4/15:18 pm
ONT
- BWI
1 stop13h 11m
Frontier
Sun 4/1210:34 am
BWI
- ONT
1 stop11h 11m
Frontier
Deal found 2/2![Frontier logo]()
$276
Best flights from Ontario to BaltimoreDiscover carefully curated flight deals from Ontario to Baltimore that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 4, 2026.
Discover carefully curated flight deals from Ontario to Baltimore that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 4, 2026.
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/185:09 pm
ONT
- BWI
1 stop9h 42m
Delta
Wed 3/257:01 am
BWI
- ONT
1 stop8h 22m
Delta
Deal found 2/3![Delta logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 2/4. 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.
Mon 5/43:26 pm
ONT
- BWI
1 stop11h 18m
Alaska Airlines
Wed 5/67:04 am
BWI
- ONT
1 stop10h 26m
Alaska Airlines
Deal found 2/4![Alaska Airlines logo]()
$341
This Southwest deal was found by Cheapflights users on 2/3. 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 2/2610:05 am
ONT
- BWI
2 stops8h 00m
Southwest
Sat 2/284:25 pm
BWI
- ONT
1 stop7h 30m
Southwest
Deal found 2/3![Southwest logo]()
$350
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/310:15 pm
ONT
- BWI
1 stop8h 21m
Delta
Wed 5/66:00 am
BWI
- ONT
1 stop8h 36m
Delta
Deal found 2/3![Delta logo]()
$257
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1710:15 pm
ONT
- BWI
2 stops10h 26m
Delta
Sun 4/196:00 am
BWI
- ONT
1 stop8h 36m
Delta
Deal found 2/4![Delta logo]()
$262
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1710:15 pm
ONT
- BWI
2 stops10h 26m
Delta
Mon 4/206:00 am
BWI
- ONT
1 stop8h 36m
Delta
Deal found 2/4![Delta logo]()
$335
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/51:10 pm
ONT
- BWI
1 stop7h 34m
Delta
Mon 3/92:38 pm
BWI
- ONT
1 stop9h 22m
Delta
Deal found 2/2![Delta logo]()
$345
This Delta deal was found by Cheapflights users on 2/1. 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 2/201:10 pm
ONT
- BWI
1 stop7h 34m
Delta
Tue 2/247:15 am
BWI
- ONT
1 stop7h 47m
Delta
Deal found 2/1![Delta logo]()
$345
This Delta deal was found by Cheapflights users on 2/2. 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 3/61:15 pm
ONT
- BWI
1 stop8h 20m
Delta
Mon 3/92:38 pm
BWI
- ONT
1 stop9h 22m
Delta
Deal found 2/2![Delta logo]()
$345
This Delta deal was found by Cheapflights users on 2/1. 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 5/1211:04 pm
ONT
- BWI
1 stop7h 14m
Delta
Wed 6/311:50 am
BWI
- ONT
1 stop9h 46m
Delta
Deal found 2/1![Delta logo]()
$345
Last-minute flights from Ontario to BaltimoreDiscover last-minute flight deals from Ontario to Baltimore. Data last updated February 4, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Baltimore. Data last updated February 4, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/61:11 pm
ONT
- BWI
1 stop7h 33m
Delta
Tue 2/107:00 am
BWI
- ONT
1 stop8h 16m
Delta
Deal found 2/3![Delta logo]()
$277
This Trip.com deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/108:36 am
ONT
- BWI
2 stops12h 55m
Frontier
Sun 2/1510:57 am
BWI
- ONT
1 stop28h 26m
Frontier
Deal found 2/1![Frontier logo]()
$306
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/1310:20 pm
ONT
- BWI
2 stops12h 56m
Delta
Sun 2/157:05 am
BWI
- ONT
1 stop8h 02m
Delta
Deal found 2/4![Delta logo]()
$282
This American Airlines deal was found by Cheapflights users on 2/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/1410:56 am
ONT
- BWI
1 stop9h 03m
American Airlines
Tue 2/176:00 am
BWI
- ONT
1 stop10h 49m
American Airlines
Deal found 2/3![American Airlines logo]()
$231
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 2/187:17 pm
ONT
- BWI
2 stops13h 00m
Frontier
Sun 2/2210:57 am
BWI
- ONT
1 stop28h 26m
Frontier
Deal found 2/2![Frontier logo]()
$314
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/201:10 pm
ONT
- BWI
1 stop7h 34m
Delta
Mon 3/92:38 pm
BWI
- ONT
1 stop9h 22m
Delta
Deal found 2/3![Delta logo]()
$257
This CheapOair deal was found by Cheapflights users on 2/3. 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.
Thu 2/2612:02 pm
ONT
- BWI
1 stop26h 44m
Alaska Airlines
Sat 2/286:46 pm
BWI
- ONT
1 stop19h 22m
Alaska Airlines
Deal found 2/3![Alaska Airlines logo]()
$341
This CheapOair deal was found by Cheapflights users on 2/1. 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 3/44:02 pm
ONT
- BWI
1 stop22h 44m
Alaska Airlines
Mon 3/96:46 pm
BWI
- ONT
1 stop19h 22m
Alaska Airlines
Deal found 2/1![Alaska Airlines logo]()
$321
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/304:22 pm
ONT
- BWI
1 stop13h 52m
Multiple Airlines
Fri 4/39:50 pm
BWI
- ONT
2 stops24h 29m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/304:22 pm
ONT
- BWI
1 stop13h 52m
Multiple Airlines
Sun 4/57:40 pm
BWI
- ONT
2 stops43h 29m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$307
One-way flights from Ontario to BaltimoreSearch for one-way flight options from Ontario to Baltimore. Find affordable one-way fares based on user searches. Data last updated February 4, 2026.
Search for one-way flight options from Ontario to Baltimore. Find affordable one-way fares based on user searches. Data last updated February 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/38:40 am
ONT
- BWI
2 stops30h 07m
Frontier
Deal found 2/2![Frontier logo]()
$86
This Trip.com deal was found by Cheapflights users on 2/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/234:22 pm
ONT
- BWI
1 stop13h 52m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$105
This Frontier deal was found by Cheapflights users on 2/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/85:18 pm
ONT
- BWI
1 stop13h 06m
Frontier
Deal found 2/4![Frontier logo]()
$106
This Trip.com deal was found by Cheapflights users on 2/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:40 am
ONT
- BWI
2 stops12h 51m
Frontier
Deal found 2/3![Frontier logo]()
$108
This Trip.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/168:26 am
ONT
- BWI
1 stop23h 46m
Frontier
Deal found 2/2![Frontier logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/32:06 pm
ONT
- BWI
3 stops24h 41m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$110
This Trip.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/304:22 pm
ONT
- BWI
1 stop13h 52m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Wed 3/48:40 am
ONT
- BWI
2 stops12h 51m
Frontier
Deal found 2/3![Frontier logo]()
$123
This Trip.com deal was found by Cheapflights users on 2/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/231:18 pm
ONT
- BWI
2 stops32h 13m
Frontier
Deal found 2/3![Frontier logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Sat 2/286:00 am
ONT
- BWI
2 stops25h 02m
Frontier
Deal found 2/2![Frontier logo]()
$125
Find flight deals from Ontario to Baltimore
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Baltimore (BWI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $200 (Travelocity) |
One-way from | $86 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $467 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Baltimore that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 4, 2026.
Use the filters below to find and compare flights from Ontario to Baltimore that are best for you.
Fly from
Ontario
Fly to
Baltimore
Route
Depart
Return
Price
OntarioBaltimore
ONT - BWI
ONTBWI
Ontario
Wed 3/18
5:09 pm-5:51 am
1 stop9h 42m
Baltimore/Washington
Wed 3/25
7:01 am-12:23 pm
1 stop8h 22m
$257
OntarioBaltimore
ONT - BWI
ONTBWI
Ontario
Sun 5/3
10:15 pm-9:36 am
1 stop8h 21m
Baltimore/Washington
Wed 5/6
6:00 am-11:36 am
1 stop8h 36m
$257
OntarioBaltimore
ONT - BWI
ONTBWI
Ontario
Fri 4/17
10:15 pm-11:41 am
2 stops10h 26m
Baltimore/Washington
Sun 4/19
6:00 am-11:36 am
1 stop8h 36m
$262
OntarioBaltimore
ONT - BWI
ONTBWI
Ontario
Fri 4/17
10:15 pm-11:41 am
2 stops10h 26m
Baltimore/Washington
Mon 4/20
6:00 am-11:36 am
1 stop8h 36m
$335
OntarioBaltimore
ONT - BWI
ONTBWI
Ontario
Mon 5/4
3:26 pm-5:44 am
1 stop11h 18m
Baltimore/Washington
Wed 5/6
7:04 am-2:30 pm
1 stop10h 26m
$341
OntarioBaltimore
ONT - BWI
ONTBWI
Ontario
Thu 3/5
1:10 pm-11:44 pm
1 stop7h 34m
Baltimore/Washington
Mon 3/9
2:38 pm-9:00 pm
1 stop9h 22m
$345
OntarioBaltimore
ONT - BWI
ONTBWI
Ontario
Fri 2/20
1:10 pm-11:44 pm
1 stop7h 34m
Baltimore/Washington
Tue 2/24
7:15 am-12:02 pm
1 stop7h 47m
$345
OntarioBaltimore
ONT - BWI
ONTBWI
Ontario
Fri 3/6
1:15 pm-12:35 am
1 stop8h 20m
Baltimore/Washington
Mon 3/9
2:38 pm-9:00 pm
1 stop9h 22m
$345
OntarioBaltimore
ONT - BWI
ONTBWI
Ontario
Tue 5/12
11:04 pm-9:18 am
1 stop7h 14m
Baltimore/Washington
Wed 6/3
11:50 am-6:36 pm
1 stop9h 46m
$345
OntarioBaltimore
ONT - BWI
ONTBWI
Ontario
Thu 2/26
10:05 am-9:05 pm
2 stops8h 00m
Baltimore/Washington
Sat 2/28
4:25 pm-8:55 pm
1 stop7h 30m
$350
Showing 1-10 of 22 results
Compare providers for flights from Ontario to Baltimore
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Baltimore in February.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Baltimore flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Baltimore flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Baltimore flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Baltimore flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Baltimore flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Baltimore
Have a flexible travel schedule? Discover the best time to fly to Baltimore from Ontario with our price prediction graph.
ONT-BWI
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Baltimore
How far ahead should I book a flight from Ontario to Baltimore?
Use this chart to determine the optimal time to book a round-trip flight from Ontario to Baltimore. Price data was last updated on January 30, 2026.
The best time to book flights from Ontario to Baltimore is 70 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Ontario to Baltimore?
Currently, August is the cheapest month in which you can book a flight from Ontario to Baltimore (average of $93). Flying from Ontario to Baltimore in December is currently the most expensive (average of $179). 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.
Reviews of airlines servicing Baltimore
Get insights into the airlines that provide service to Baltimore. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Baltimore. Reviews last updated February 4, 2026.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Ontario to Baltimore. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Related info for your journey
Find useful and relevant information for your journey from Ontario to Baltimore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Complete your trip
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Search flights from Ontario to Baltimore by cabin class
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Ontario and Baltimore flights
Browse other Ontario and Baltimore flight options. Last updated on February 4, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on February 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 6 airlines flying from Ontario to Baltimore
Discover the top 6 airlines that operate flights from Ontario to Baltimore. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$72 | Average$224 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$136 | Average$228 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$183 | Average$427 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$276 | Average$438 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$337 | Average$471 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$346 | Average$544 | FlexibilityNo cancel fee | On-time71% |