$109+ Cheap flights from Maryland to Ontario (ONT)
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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ONT
Oct 13 — Oct 201
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Maryland 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.Cheap flight deals from Maryland to Ontario
Cheapest
Best
Last-minute
One-way
Cheapest flights from Maryland to OntarioExplore the most affordable flight options available from Maryland to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 13, 2026.
Explore the most affordable flight options available from Maryland to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 13, 2026.
This deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/56:00 pm -
1 stop8h 51m
Sun 11/86:25 am -
1 stop7h 22m
Deal found 9/9![Frontier logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/21:29 pm -
1 stop30h 17m
Tue 10/65:31 pm -
1 stop15h 09m
Deal found 9/10![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1612:31 pm -
1 stop31h 07m
Wed 11/185:33 pm -
1 stop15h 03m
Deal found 9/11![Frontier logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/212:30 pm -
1 stop31h 16m
Mon 10/57:46 pm -
1 stop16h 48m
Deal found 9/11![Frontier logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:42 pm -
1 stop27h 06m
Mon 10/56:45 pm -
2 stops19h 01m
Deal found 9/10![Frontier logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:50 am -
1 stop21h 00m
Sat 10/246:15 am -
1 stop16h 01m
Deal found 9/10![Frontier logo]()
$249
This Orbitz deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:00 am -
1 stop8h 16m
Thu 10/221:38 pm -
1 stop13h 42m
Deal found 9/10![Frontier logo]()
$249
This Expedia deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:00 am -
1 stop13h 30m
Sat 10/245:25 pm -
1 stop9h 55m
Deal found 9/10![Frontier logo]()
$251
This Frontier deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/152:16 pm -
1 stop7h 49m
Thu 10/298:03 pm -
1 stop11h 49m
Deal found 9/9![Frontier logo]()
$252
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:00 pm -
1 stop13h 50m
Tue 10/276:25 am -
1 stop12h 25m
Deal found 9/10![Frontier logo]()
$252
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:00 am -
1 stop8h 16m
Thu 10/158:35 pm -
1 stop6h 45m
Deal found 9/10![Frontier logo]()
$252
This Frontier deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:00 pm -
1 stop8h 51m
Sat 11/76:25 am -
1 stop7h 22m
Deal found 9/8![Frontier logo]()
$253
Best flights from Maryland to OntarioDiscover carefully curated flight deals from Maryland to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.
Discover carefully curated flight deals from Maryland to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:00 am -
1 stop8h 08m
Mon 11/1612:18 pm -
1 stop7h 27m
Deal found 9/8![Delta logo]()
$351
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/132:36 pm -
1 stop8h 50m
Sat 1/167:00 am -
1 stop7h 23m
Deal found 9/10![United Airlines logo]()
$351
This Southwest deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/155:00 am -
1 stop7h 55m
Sun 11/1511:55 pm -
1 stop8h 10m
Deal found 9/8![Southwest logo]()
$369
This Alaska Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:15 pm -
1 stop19h 02m
Wed 10/286:02 am -
1 stop20h 18m
Deal found 9/10![Alaska Airlines logo]()
$395
This KAYAK deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:59 am -
1 stop9h 31m
Mon 10/1211:59 pm -
1 stop8h 06m
Deal found 9/11![American Airlines logo]()
$461
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/135:00 pm -
1 stop8h 48m
Sat 1/166:00 am -
1 stop7h 17m
Deal found 9/10![Delta logo]()
$351
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:00 am -
1 stop9h 29m
Mon 11/96:37 pm -
1 stop10h 02m
Deal found 9/9![United Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/136:20 am -
2 stops10h 05m
Sat 1/165:25 am -
2 stops10h 15m
Deal found 9/10![Southwest logo]()
$371
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/126:00 am -
1 stop8h 08m
Wed 1/66:00 am -
1 stop7h 17m
Deal found 9/9![Delta logo]()
$351
This Alaska Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:02 am -
1 stop9h 14m
Tue 10/1311:13 am -
1 stop9h 46m
Deal found 9/12![Alaska Airlines logo]()
$396
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/94:07 pm -
1 stop7h 13m
Sat 2/206:30 am -
1 stop8h 18m
Deal found 9/12![United Airlines logo]()
$371
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/126:20 am -
2 stops10h 05m
Sat 1/165:25 am -
2 stops10h 15m
Deal found 9/10![Southwest logo]()
$371
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/25:59 pm -
1 stop7h 13m
Fri 11/612:16 pm -
1 stop7h 33m
Deal found 9/12![Delta logo]()
$366
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/94:08 pm -
1 stop7h 12m
Sat 2/201:33 pm -
1 stop8h 44m
Deal found 9/12![United Airlines logo]()
$371
This Alaska Airlines deal was found by Cheapflights users on 9/12. 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.
Wed 11/117:02 am -
1 stop11h 11m
Sat 11/144:09 pm -
1 stop10h 23m
Deal found 9/12![Alaska Airlines logo]()
$410
This Southwest deal was found by Cheapflights users on 9/12. 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 1/96:10 am -
2 stops11h 15m
Sat 2/205:10 am -
1 stop6h 05m
Deal found 9/12![Southwest logo]()
$376
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:00 am -
1 stop8h 06m
Fri 11/61:35 pm -
1 stop7h 00m
Deal found 9/12![Delta logo]()
$366
This Southwest deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/91:15 pm -
2 stops9h 30m
Tue 2/2310:05 am -
2 stops8h 10m
Deal found 9/8![Southwest logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 9/12. 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 11/237:00 am -
1 stop11h 05m
Thu 12/35:01 pm -
1 stop9h 34m
Deal found 9/12![Alaska Airlines logo]()
$421
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected ” under the list of providers to see comparable flight deals.
Mon 11/97:00 am -
1 stop8h 17m
Mon 11/1611:10 pm -
1 stop6h 59m
Deal found 9/11![Delta logo]()
$371
This KAYAK deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/125:48 pm -
1 stop8h 11m
Thu 10/1510:10 pm -
1 stop7h 35m
Deal found 9/8![American Airlines logo]()
$558
This Southwest deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/65:10 am -
2 stops10h 30m
Tue 3/161:05 pm -
2 stops8h 20m
Deal found 9/8![Southwest logo]()
$382
This Alaska Airlines deal was found by Cheapflights users on 9/12. 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 11/27:02 am -
1 stop11h 11m
Thu 11/54:09 pm -
1 stop10h 23m
Deal found 9/12![Alaska Airlines logo]()
$431
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/72:05 pm -
1 stop9h 46m
Mon 11/161:35 pm -
1 stop8h 24m
Deal found 9/8![United Airlines logo]()
$461
This Delta deal was found by Cheapflights users on 9/12. 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 1/66:40 am -
1 stop7h 47m
Fri 1/81:00 pm -
1 stop7h 46m
Deal found 9/12![Delta logo]()
$386
This Southwest deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:50 pm -
2 stops16h 25m
Sat 12/126:10 am -
2 stops10h 35m
Deal found 9/12![Southwest logo]()
$387
This Alaska Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:41 pm -
1 stop20h 25m
Tue 11/34:06 pm -
2 stops34h 26m
Deal found 9/11![Alaska Airlines logo]()
$433
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/102:24 pm -
1 stop10h 35m
Mon 12/146:40 pm -
1 stop9h 03m
Deal found 9/10![United Airlines logo]()
$461
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:00 am -
1 stop8h 06m
Fri 10/1611:19 pm -
1 stop6h 51m
Deal found 9/10![Delta logo]()
$391
This Alaska Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/157:05 am -
1 stop11h 08m
Mon 11/234:01 pm -
1 stop10h 39m
Deal found 9/9![Alaska Airlines logo]()
$460
Last-minute flights from Maryland to OntarioDiscover last-minute flight deals from Maryland to Ontario. Data last updated September 13, 2026 and is based on user searches.
Discover last-minute flight deals from Maryland to Ontario. Data last updated September 13, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:42 pm -
1 stop27h 06m
Mon 10/56:45 pm -
2 stops19h 01m
Deal found 9/10![Frontier logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/21:29 pm -
1 stop30h 17m
Tue 10/65:31 pm -
1 stop15h 09m
Deal found 9/10![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/212:30 pm -
1 stop31h 16m
Mon 10/57:46 pm -
1 stop16h 48m
Deal found 9/11![Frontier logo]()
$228
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:00 am -
1 stop13h 59m
Thu 10/153:38 pm -
1 stop11h 42m
Deal found 9/10![Frontier logo]()
$253
This Booking.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:00 pm -
1 stop8h 47m
Tue 10/136:15 am -
1 stop26h 49m
Deal found 9/8![Frontier logo]()
$258
This Frontier deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/152:16 pm -
1 stop7h 49m
Thu 10/298:03 pm -
1 stop11h 49m
Deal found 9/9![Frontier logo]()
$252
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:00 am -
1 stop8h 16m
Thu 10/158:35 pm -
1 stop6h 45m
Deal found 9/10![Frontier logo]()
$252
This Orbitz deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:00 am -
1 stop8h 16m
Thu 10/221:38 pm -
1 stop13h 42m
Deal found 9/10![Frontier logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:50 am -
1 stop21h 00m
Sat 10/246:15 am -
1 stop16h 01m
Deal found 9/10![Frontier logo]()
$249
This Expedia deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:00 am -
1 stop13h 30m
Sat 10/245:25 pm -
1 stop9h 55m
Deal found 9/10![Frontier logo]()
$251
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:00 pm -
1 stop13h 50m
Sat 10/246:15 am -
1 stop12h 44m
Deal found 9/10![Frontier logo]()
$252
This Frontier deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:00 pm -
1 stop8h 51m
Sat 11/76:25 am -
1 stop7h 22m
Deal found 9/8![Frontier logo]()
$253
One-way flights from Maryland to OntarioSearch for one-way flight options from Maryland to Ontario. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.
Search for one-way flight options from Maryland to Ontario. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1712:36 pm -
2 stops14h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 11/312:36 pm -
2 stops14h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Frontier logo]()
$110
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 11/25:22 pm -
2 stops20h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Frontier logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/195:22 pm -
2 stops20h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$117
This Super.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:45 pm -
1 stop8h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$124
This Super.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1111:07 am -
1 stop8h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$125
This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/92:07 pm -
1 stop8h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$126
This Super.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:42 pm -
1 stop27h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$128
This CheapOair deal was found by Cheapflights users on 9/12. 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.
Tue 11/1011:07 am -
1 stop8h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Frontier logo]()
$131
This Booking.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:42 pm -
1 stop27h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$132
This Super.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/215:50 am -
1 stop7h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$132
This Super.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/255:50 am -
1 stop7h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$133
Find flight deals from Maryland to Ontario
Keep the following information in mind while searching for Maryland to Ontario flight deals. Data was last updated September 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $185 |
One-way from | $109 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $362 |
Cheapflights Fare Finder
Customize your flight search to find flights from Maryland 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 7,457,451 searches. Data last updated September 13, 2026.
Use the filters below to find and compare flights from Maryland to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Washington, D.C.Ontario
DCA Washington, D.C. Reagan-National - ONT Ontario
DCAONT
Washington, D.C. Reagan-National
Mon 2/1
5:00 pm-11:48 pm
1 stop9h 48m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$176
Washington, D.C.Ontario
IAD Washington, D.C. Dulles Intl - ONT Ontario
IADONT
Washington, D.C. Dulles Intl
Sat 11/14
12:35 pm-8:15 pm
1 stop10h 40m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$176
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Mon 11/16
5:00 am-10:10 am
1 stop8h 10m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$185
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Fri 10/30
4:17 pm-11:54 pm
1 stop10h 37m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$185
Washington, D.C.Ontario
IAD Washington, D.C. Dulles Intl - ONT Ontario
IADONT
Washington, D.C. Dulles Intl
Wed 11/18
6:00 am-11:08 am
1 stop8h 08m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$186
Washington, D.C.Ontario
IAD Washington, D.C. Dulles Intl - ONT Ontario
IADONT
Washington, D.C. Dulles Intl
Wed 10/14
7:02 am-1:16 pm
1 stop9h 14m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$186
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Thu 11/26
10:30 am-7:42 pm
2 stops12h 12m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$190
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Fri 10/23
5:10 pm-11:55 pm
2 stops9h 45m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$190
Washington, D.C.Ontario
DCA Washington, D.C. Reagan-National - ONT Ontario
DCAONT
Washington, D.C. Reagan-National
Wed 1/13
6:20 am-1:25 pm
2 stops10h 05m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$191
PhiladelphiaOntario
PHL Philadelphia - ONT Ontario
PHLONT
Philadelphia
Mon 11/23
7:00 am-3:05 pm
1 stop11h 05m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$195
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Maryland to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Maryland with our price prediction graph.
BWI-ONT
IAD-ONT
PHL-ONT
DCA-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 Maryland to Ontario
USMD-ONT
BWI-ONT
IAD-ONT
PHL-ONT
DCA-ONT
What is the cheapest month to book a flight from Maryland to Ontario?
Currently, February is the cheapest month in which you can book a flight from Maryland to Ontario (average of $371). Flying from Maryland to Ontario in July is currently the most expensive (average of $553). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from MD to ONT?
Find hourly flight availability from Maryland 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 September 13, 2026.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 19% on flights from Maryland to Ontario by exploring options for tickets in the morning.
How much does it cost to fly round-trip from Maryland to Ontario?
Airfare is below average for this route at the moment.
Maryland to Ontario flights typically cost between $386 and $460 in October.The cheapest round-trip price found within the last 5 days was $204 on Frontier (Oct 2-Oct 6).
How far ahead should I book a flight from Maryland to Ontario?
Booking 25 days in advance of your planned departure date is, on average, the best time to get cheap flights from Maryland to Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Related info for your journey
Find useful and relevant information for your journey from Maryland to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Popular flights
Top destinations
Alternative routes for Maryland to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Maryland to Ontario by cabin class
Find flights from Maryland 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 September 13, 2026.
Maryland and Ontario flights
Browse other Maryland and Ontario flight options. Last updated on September 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Maryland to Ontario flights
Consider these flights traveling from Maryland to Ontario.
Top 5 airlines flying from Maryland to Ontario
Discover the top 5 airlines that operate flights from Maryland 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 7,457,451 searches. Data last updated September 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$192 | Average$450 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$211 | Average$352 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$344 | Average$479 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$352 | Average$475 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$460 | Average$546 | FlexibilityNo cancel fee | On-time71% |