$99+ Cheap flights from Ontario to Baltimore (ONT - BWI)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BWI
Nov 29 — Dec 61
Round-trip
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 February or January, booked 16 days in advance, depart on a Wednesday or Saturday and return on a Thursday
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 October 30, 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 October 30, 2026.
This Mytrip deal was found by Cheapflights users on 10/27. 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 12/12:00 pm -
2 stops19h 11m
Mon 12/76:41 pm -
2 stops19h 04m
Deal found 10/27![Frontier logo]()
$187
This Mytrip deal was found by Cheapflights users on 10/27. 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 12/12:00 pm -
2 stops19h 11m
Sat 12/52:00 pm -
2 stops11h 17m
Deal found 10/27![Frontier logo]()
$189
This Mytrip deal was found by Cheapflights users on 10/28. 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 12/12:00 pm -
2 stops19h 11m
Tue 12/88:41 pm -
2 stops17h 04m
Deal found 10/28![Frontier logo]()
$197
This Mytrip deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:00 am -
2 stops23h 42m
Wed 12/161:05 pm -
2 stops22h 00m
Deal found 10/28![Frontier logo]()
$199
This Mytrip deal was found by Cheapflights users on 10/29. 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 12/58:44 am -
2 stops10h 57m
Mon 12/72:00 pm -
2 stops13h 20m
Deal found 10/29![Frontier logo]()
$207
This Mytrip deal was found by Cheapflights users on 10/26. 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 12/72:53 pm -
2 stops18h 17m
Wed 12/166:00 am -
2 stops15h 31m
Deal found 10/26![Frontier logo]()
$210
This Mytrip deal was found by Cheapflights users on 10/27. 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.
Fri 12/112:53 pm -
2 stops18h 38m
Mon 12/146:41 pm -
2 stops19h 04m
Deal found 10/27![Frontier logo]()
$212
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Thu 12/108:44 am -
2 stops10h 57m
Tue 12/156:00 am -
2 stops15h 31m
Deal found 10/29![Frontier logo]()
$215
This Mytrip deal was found by Cheapflights users on 10/26. 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 12/12:00 pm -
2 stops19h 11m
Fri 12/116:41 pm -
2 stops19h 04m
Deal found 10/26![Frontier logo]()
$220
This Mytrip deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/22:00 pm -
2 stops19h 22m
Mon 12/76:41 pm -
2 stops19h 04m
Deal found 10/29![Frontier logo]()
$221
This Mytrip deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/211:30 am -
2 stops18h 10m
Wed 12/96:00 am -
2 stops15h 31m
Deal found 10/26![Frontier logo]()
$223
This Mytrip deal was found by Cheapflights users on 10/26. 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.
Fri 12/112:53 pm -
2 stops18h 38m
Tue 12/155:47 pm -
2 stops21h 04m
Deal found 10/26![Frontier logo]()
$231
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 October 30, 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 October 30, 2026.
This Delta deal was found by Cheapflights users on 10/29. 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 12/115:04 pm -
1 stop9h 56m
Mon 12/147:15 am -
1 stop8h 02m
Deal found 10/29![Delta logo]()
$353
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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.
Thu 11/266:00 am -
1 stop8h 36m
Thu 12/37:00 am -
1 stop12h 05m
Deal found 10/27![Alaska Airlines logo]()
$381
This Southwest deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/259:50 am -
1 stop8h 10m
Wed 12/28:05 am -
1 stop9h 35m
Deal found 10/29![Southwest logo]()
$443
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Fri 12/116:40 pm -
2 stops12h 02m
Mon 12/146:10 am -
2 stops14h 26m
Deal found 10/28![United Airlines logo]()
$493
This Delta deal was found by Cheapflights users on 10/28. 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 12/1512:20 pm -
1 stop9h 47m
Sat 1/97:00 am -
1 stop8h 12m
Deal found 10/28![Delta logo]()
$369
This Delta deal was found by Cheapflights users on 10/28. 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 12/165:04 pm -
1 stop9h 56m
Sat 1/97:00 am -
1 stop8h 12m
Deal found 10/28![Delta logo]()
$369
This Alaska Airlines deal was found by Cheapflights users on 10/26. 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.
Thu 12/35:01 pm -
1 stop9h 36m
Sat 12/57:00 am -
1 stop12h 05m
Deal found 10/26![Alaska Airlines logo]()
$448
This Southwest deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/235:10 am -
2 stops8h 35m
Fri 1/14:05 pm -
2 stops9h 00m
Deal found 10/25![Southwest logo]()
$467
This Delta deal was found by Cheapflights users on 10/28. 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 12/1812:20 pm -
1 stop9h 48m
Fri 1/87:00 am -
1 stop8h 12m
Deal found 10/28![Delta logo]()
$405
This Southwest deal was found by Cheapflights users on 10/27. 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.
Sun 1/318:05 am -
1 stop6h 15m
Sat 2/66:15 am -
1 stop8h 50m
Deal found 10/27![Southwest logo]()
$478
This Delta deal was found by Cheapflights users on 10/25. 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 11/185:04 pm -
1 stop9h 56m
Sun 11/227:15 am -
1 stop8h 05m
Deal found 10/25![Delta logo]()
$478
Last-minute flights from Ontario to BaltimoreDiscover last-minute flight deals from Ontario to Baltimore. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Baltimore. Data last updated October 30, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 10/26. 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 11/168:03 pm -
1 stop11h 49m
Wed 11/1811:37 am -
1 stop8h 01m
Deal found 10/26![Frontier logo]()
$232
This Mytrip deal was found by Cheapflights users on 10/26. 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 11/168:35 pm -
2 stops11h 17m
Mon 11/235:42 pm -
2 stops17h 48m
Deal found 10/26![Frontier logo]()
$248
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 11/168:03 pm -
1 stop11h 49m
Thu 11/2610:02 am -
2 stops17h 12m
Deal found 10/25![Frontier logo]()
$268
This Mytrip deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/185:07 pm -
2 stops14h 45m
Sat 11/215:42 pm -
2 stops20h 57m
Deal found 10/27![Frontier logo]()
$258
This Mytrip deal was found by Cheapflights users on 10/28. 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 11/236:45 am -
2 stops14h 58m
Wed 12/26:00 am -
2 stops19h 20m
Deal found 10/28![Frontier logo]()
$239
This Mytrip deal was found by Cheapflights users on 10/28. 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 11/247:30 am -
1 stop29h 36m
Tue 12/110:35 am -
2 stops14h 45m
Deal found 10/28![Frontier logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/257:30 am -
1 stop29h 36m
Wed 12/26:43 pm -
2 stops17h 45m
Deal found 10/29![Frontier logo]()
$255
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 October 30, 2026.
Search for one-way flight options from Ontario to Baltimore. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/256:45 am -
2 stops35h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$99
This Mytrip deal was found by Cheapflights users on 10/27. 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 12/811:30 am -
2 stops18h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Frontier logo]()
$103
This Mytrip deal was found by Cheapflights users on 10/27. 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 12/72:53 pm -
2 stops18h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Frontier logo]()
$104
This Mytrip deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/911:30 am -
2 stops18h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Frontier logo]()
$106
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 12/1611:30 am -
2 stops16h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Frontier logo]()
$107
This Trip.com deal was found by Cheapflights users on 10/29. 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.
Sat 12/58:44 am -
2 stops10h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$108
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 11/98:35 pm -
2 stops11h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$111
This Booking.com deal was found by Cheapflights users on 10/28. 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 12/1511:30 am -
2 stops18h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Frontier logo]()
$112
This Mytrip deal was found by Cheapflights users on 10/28. 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 12/1211:30 am -
2 stops18h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Frontier logo]()
$114
This Mytrip deal was found by Cheapflights users on 10/26. 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 11/162:23 pm -
2 stops17h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Frontier logo]()
$118
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 October 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $187 (Mytrip) |
One-way from | $99 (Kiwi.com) |
Popular in | October |
Cheapest in | February |
Average price | $604 |
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 7,457,451 searches. Data last updated October 30, 2026.
Use the filters below to find and compare flights from Ontario to Baltimore that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Sat 12/12
5:12 pm-6:00 am
1 stop9h 48m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$167
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Sun 1/31
7:10 pm-5:35 pm
2 stops19h 25m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$197
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Tue 11/17
7:05 am-5:24 pm
1 stop7h 19m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$203
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Thu 1/7
1:20 pm-11:54 pm
1 stop7h 34m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$203
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Fri 11/27
7:00 am-7:14 pm
1 stop9h 14m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$208
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Mon 1/4
6:00 am-5:42 pm
1 stop8h 42m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$208
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Wed 11/18
12:18 pm-11:35 pm
1 stop8h 17m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$224
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Mon 12/14
5:00 am-3:16 pm
1 stop7h 16m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$232
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Fri 11/27
7:00 am-7:09 pm
1 stop9h 09m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$252
OntarioBaltimore
ONT Ontario - BWI Baltimore/Washington
ONTBWI
Ontario
Fri 11/27
6:55 am-6:45 pm
2 stops8h 50m
Baltimore/Washington
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$260
Showing 1-10 of 22 resultsSorted by cheapest first
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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- 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
Prices
More
How far ahead should I book a flight from Ontario to Baltimore?
The best time to book flights from Ontario to Baltimore is 15 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, February is the cheapest month in which you can book a flight from Ontario to Baltimore (average of $363). Flying from Ontario to Baltimore in October is currently the most expensive (average of $604). 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.
How much does it cost to fly round-trip from Ontario to Baltimore?
Airfare is below average for this route at the moment.
Ontario to Baltimore flights typically cost between $441 and $739 in December.The cheapest round-trip price found within the last 5 days was $187 on Frontier (Dec 1-Dec 7).
What’s the top layover airport for flights from Ontario to Baltimore?
Share of 1-stop round-trip flights from Ontario to Baltimore chosen by Cheapflights users in the past 12 months, using the same layover each way.
Houston (IAH) – chosen by Cheapflights users on 50% of 1-stop itineraries from Ontario to Baltimore on Cheapflights.
What’s the cheapest layover airport for flights from Ontario to Baltimore?
Average round-trip fare for 1-stop flights from Ontario to Baltimore, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Houston (IAH) is the most affordable 1-stop option, with an average round-trip price of $258.
What’s the fastest layover option from Ontario to Baltimore?
Shortest average travel time for 1-stop one-way flights from Ontario to Baltimore, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Dallas (DFW) have the shortest average one-way travel time for 1-stop routes: 8h 13m.
Which airport typically offers the quickest layover for flights from Ontario to Baltimore?
Average layover duration for 1-stop one-way flights from Ontario to Baltimore, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Houston (HOU) offer the fastest connection on this route, with an average layover time of 1h 45m.
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 October 30, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited 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.
Boarding
8.1
Entertainment
7.4
Overall
7.9
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Boarding
8.1
Entertainment
7.4
Overall
7.9
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Boarding
8.1
Entertainment
7.4
Overall
7.9
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Boarding
8.1
Entertainment
7.4
Overall
7.9
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Boarding
8.1
Entertainment
7.4
Overall
7.9
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Boarding
8.1
Entertainment
7.4
Overall
7.9
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
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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Ontario and Baltimore flights
Browse other Ontario and Baltimore flight options. Last updated on October 30, 2026.
Other flights from Ontario
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Popular flight searches
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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 7,457,451 searches. Data last updated October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$208 | Average$464 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$221 | Average$320 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$272 | Average$441 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$352 | Average$488 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$361 | Average$464 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$434 | Average$513 | FlexibilityNo cancel fee | On-time71% |