$236+ Cheap flights from Costa Rica to Ontario (ONT)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — ONT
Sep 18 — Sep 251
Round-trip
1 adult, Economy
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Find cheap flights from Costa Rica 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 Costa Rica to Ontario
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Cheapest flights from Costa Rica to OntarioExplore the most affordable flight options available from Costa Rica to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 19, 2026.
Explore the most affordable flight options available from Costa Rica to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 19, 2026.
This Southwest deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:00 pm -
2 stops10h 00m
Wed 10/285:50 am -
2 stops12h 50m
Deal found 8/18![Southwest logo]()
$515
This United Airlines deal was found by Cheapflights users on 8/14. 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 9/248:45 am -
1 stop12h 46m
Fri 10/96:00 am -
1 stop24h 15m
Deal found 8/14![United Airlines logo]()
$521
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:45 am -
1 stop12h 46m
Fri 10/21:52 pm -
2 stops21h 29m
Deal found 8/18![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Sun 10/188:45 am -
1 stop15h 06m
Wed 11/46:00 am -
1 stop12h 39m
Deal found 8/14![United Airlines logo]()
$542
This United Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:45 am -
2 stops13h 30m
Thu 10/299:25 am -
2 stops24h 00m
Deal found 8/16![United Airlines logo]()
$546
This American Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/242:57 pm -
2 stops21h 50m
Mon 9/282:22 pm -
2 stops21h 37m
Deal found 8/18![American Airlines logo]()
$555
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/48:45 am -
1 stop28h 27m
Mon 9/146:00 am -
1 stop12h 37m
Deal found 8/18![United Airlines logo]()
$567
This American Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/42:56 pm -
2 stops21h 47m
Sun 9/131:04 pm -
2 stops23h 53m
Deal found 8/18![American Airlines logo]()
$580
This Southwest deal was found by Cheapflights users on 8/14. 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 9/231:40 pm -
1 stop9h 25m
Mon 10/56:40 am -
2 stops12h 00m
Deal found 8/14![Southwest logo]()
$581
This United Airlines deal was found by Cheapflights users on 8/15. 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 9/171:20 pm -
2 stops32h 33m
Sun 9/206:00 am -
1 stop29h 10m
Deal found 8/15![United Airlines logo]()
$618
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/198:45 am -
1 stop15h 26m
Mon 1/45:00 am -
1 stop9h 10m
Deal found 8/18![United Airlines logo]()
$639
This United Airlines deal was found by Cheapflights users on 8/14. 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 10/171:03 pm -
2 stops24h 43m
Sun 11/19:25 am -
2 stops25h 45m
Deal found 8/14![United Airlines logo]()
$652
Best flights from Costa Rica to OntarioDiscover carefully curated flight deals from Costa Rica to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 19, 2026.
Discover carefully curated flight deals from Costa Rica to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 19, 2026.
This Southwest deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:00 pm -
2 stops10h 00m
Wed 10/285:50 am -
2 stops12h 50m
Deal found 8/18![Southwest logo]()
$515
This United Airlines deal was found by Cheapflights users on 8/15. 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 10/177:55 am -
2 stops15h 56m
Mon 10/191:52 pm -
2 stops21h 29m
Deal found 8/15![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 8/17. 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 10/27:55 am -
1 stop15h 04m
Sun 10/411:10 am -
2 stops24h 11m
Deal found 8/17![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 8/15. 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.
Sun 12/202:25 pm -
1 stop9h 46m
Sun 1/106:00 am -
1 stop10h 16m
Deal found 8/15![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 8/17. 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 10/18:45 am -
1 stop12h 46m
Sun 10/41:52 pm -
1 stop16h 23m
Deal found 8/17![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/198:45 am -
1 stop15h 26m
Sun 1/106:53 pm -
1 stop11h 39m
Deal found 8/18![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/61:25 pm -
2 stops24h 21m
Fri 10/166:32 pm -
1 stop11h 43m
Deal found 8/16![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 8/14. 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 11/188:45 am -
2 stops13h 30m
Thu 12/31:33 pm -
2 stops21h 42m
Deal found 8/14![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 8/17. 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 10/27:55 am -
2 stops15h 56m
Fri 10/96:00 am -
1 stop24h 15m
Deal found 8/17![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/28:45 am -
2 stops13h 30m
Sat 11/74:17 pm -
2 stops17h 08m
Deal found 8/17![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 8/15. 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 9/191:25 pm -
2 stops29h 46m
Sun 10/411:10 am -
1 stop19h 05m
Deal found 8/15![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/179:40 am -
1 stop31h 53m
Sun 11/226:00 am -
1 stop27h 25m
Deal found 8/16![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 8/16. 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 1/2212:50 pm -
1 stop9h 30m
Mon 1/255:00 am -
1 stop9h 08m
Deal found 8/16![United Airlines logo]()
$627
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/171:20 pm -
2 stops34h 31m
Thu 9/2411:10 am -
2 stops24h 00m
Deal found 8/17![United Airlines logo]()
$639
This United Airlines deal was found by Cheapflights users on 8/14. 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 10/171:03 pm -
2 stops24h 43m
Wed 11/41:35 pm -
2 stops24h 35m
Deal found 8/14![United Airlines logo]()
$652
This United Airlines deal was found by Cheapflights users on 8/14. 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 10/171:03 pm -
2 stops24h 43m
Sat 11/76:00 am -
1 stop10h 34m
Deal found 8/14![United Airlines logo]()
$673
This United Airlines deal was found by Cheapflights users on 8/14. 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 10/141:20 pm -
2 stops22h 03m
Tue 11/34:17 pm -
2 stops18h 53m
Deal found 8/14![United Airlines logo]()
$687
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/121:20 pm -
2 stops46h 03m
Sat 10/171:52 pm -
2 stops21h 18m
Deal found 8/18![United Airlines logo]()
$716
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/51:20 pm -
2 stops23h 52m
Tue 9/151:56 pm -
2 stops21h 14m
Deal found 8/19![United Airlines logo]()
$738
Last-minute flights from Costa Rica to OntarioDiscover last-minute flight deals from Costa Rica to Ontario. Data last updated August 19, 2026 and is based on user searches.
Discover last-minute flight deals from Costa Rica to Ontario. Data last updated August 19, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/271:20 pm -
2 stops29h 51m
Wed 9/91:56 pm -
2 stops21h 14m
Deal found 8/18![United Airlines logo]()
$732
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/48:45 am -
1 stop31h 56m
Tue 9/151:56 pm -
2 stops21h 25m
Deal found 8/18![United Airlines logo]()
$567
This American Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/42:56 pm -
2 stops21h 47m
Sun 9/131:04 pm -
2 stops23h 53m
Deal found 8/18![American Airlines logo]()
$580
This American Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/42:56 pm -
2 stops19h 38m
Tue 9/152:22 pm -
2 stops28h 45m
Deal found 8/18![American Airlines logo]()
$600
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/51:20 pm -
2 stops23h 52m
Tue 9/151:56 pm -
2 stops21h 14m
Deal found 8/19![United Airlines logo]()
$738
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:45 am -
1 stop12h 16m
Mon 9/146:00 am -
1 stop12h 37m
Deal found 8/18![United Airlines logo]()
$613
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:45 am -
1 stop15h 06m
Thu 9/244:03 pm -
1 stop14h 12m
Deal found 8/18![United Airlines logo]()
$542
This United Airlines deal was found by Cheapflights users on 8/15. 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 9/171:20 pm -
2 stops32h 33m
Sun 9/206:00 am -
1 stop29h 10m
Deal found 8/15![United Airlines logo]()
$618
This United Airlines deal was found by Cheapflights users on 8/14. 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 9/171:20 pm -
2 stops32h 33m
Thu 9/245:00 am -
2 stops30h 10m
Deal found 8/14![United Airlines logo]()
$639
This Southwest deal was found by Cheapflights users on 8/14. 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 9/231:40 pm -
1 stop9h 25m
Mon 10/56:40 am -
2 stops12h 00m
Deal found 8/14![Southwest logo]()
$581
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:45 am -
1 stop15h 14m
Sat 10/311:10 am -
1 stop19h 05m
Deal found 8/19![United Airlines logo]()
$533
This American Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/242:57 pm -
2 stops21h 50m
Mon 9/282:22 pm -
2 stops21h 37m
Deal found 8/18![American Airlines logo]()
$555
One-way flights from Costa Rica to OntarioSearch for one-way flight options from Costa Rica to Ontario. Find affordable one-way fares based on user searches. Data last updated August 19, 2026.
Search for one-way flight options from Costa Rica to Ontario. Find affordable one-way fares based on user searches. Data last updated August 19, 2026.
This Booking.com deal was found by Cheapflights users on 8/17. 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 12/34:15 pm -
1 stop9h 43m
Deal found 8/17![Multiple Airlines logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/211:15 pm -
2 stops28h 44m
Deal found 8/16![Multiple Airlines logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/11:15 pm -
3 stops46h 15m
Deal found 8/18![Multiple Airlines logo]()
$253
This Southwest deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/11:30 pm -
2 stops11h 25m
Deal found 8/18![Southwest logo]()
$283
This Southwest deal was found by Cheapflights users on 8/16. 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 12/152:15 pm -
1 stop9h 45m
Deal found 8/16![Southwest logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/81:15 pm -
2 stops44h 54m
Deal found 8/18![Multiple Airlines logo]()
$288
This Faresmojo deal was found by Cheapflights users on 8/16. 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 Faresmojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/231:40 pm -
1 stop9h 25m
Deal found 8/16![JetBlue logo]()
$292
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:45 am -
1 stop26h 38m
Deal found 8/18![United Airlines logo]()
$296
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/181:25 pm -
2 stops23h 47m
Deal found 8/17![United Airlines logo]()
$302
This American Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/61:00 pm -
1 stop23h 53m
Deal found 8/18![American Airlines logo]()
$305
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/11:20 pm -
2 stops27h 02m
Deal found 8/18![United Airlines logo]()
$333
This Southwest deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/252:45 pm -
1 stop9h 15m
Deal found 8/17![Southwest logo]()
$334
Find flight deals from Costa Rica to Ontario
Keep the following information in mind while searching for Costa Rica to Ontario flight deals. Data was last updated August 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $515 (Southwest) |
One-way from | $236 (Booking.com) |
Popular in | July |
Cheapest in | February |
Average price | $582 |
Cheapflights Fare Finder
Customize your flight search to find flights from Costa Rica to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 19, 2026.
Use the filters below to find and compare flights from Costa Rica to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San JoséOntario
SJO San José Juan Santamaria Intl - ONT Ontario
SJOONT
San José Juan Santamaria Intl
Wed 10/21
1:00 pm-10:00 pm
2 stops10h 00m
Ontario
Wed 10/28
5:50 am-7:40 pm
2 stops12h 50m
$515
San JoséOntario
SJO San José Juan Santamaria Intl - ONT Ontario
SJOONT
San José Juan Santamaria Intl
Sat 10/17
7:55 am-10:51 pm
2 stops15h 56m
Ontario
Mon 10/19
1:52 pm-12:21 pm
2 stops21h 29m
$533
San JoséOntario
SJO San José Juan Santamaria Intl - ONT Ontario
SJOONT
San José Juan Santamaria Intl
Fri 10/2
7:55 am-9:59 pm
1 stop15h 04m
Ontario
Sun 10/4
11:10 am-12:21 pm
2 stops24h 11m
$533
San JoséOntario
SJO San José Juan Santamaria Intl - ONT Ontario
SJOONT
San José Juan Santamaria Intl
Sun 12/20
2:25 pm-10:11 pm
1 stop9h 46m
Ontario
Sun 1/10
6:00 am-6:16 pm
1 stop10h 16m
$533
San JoséOntario
SJO San José Juan Santamaria Intl - ONT Ontario
SJOONT
San José Juan Santamaria Intl
Thu 10/1
8:45 am-8:31 pm
1 stop12h 46m
Ontario
Sun 10/4
1:52 pm-7:15 am
1 stop16h 23m
$533
San JoséOntario
SJO San José Juan Santamaria Intl - ONT Ontario
SJOONT
San José Juan Santamaria Intl
Sat 12/19
8:45 am-10:11 pm
1 stop15h 26m
Ontario
Sun 1/10
6:53 pm-8:32 am
1 stop11h 39m
$533
San JoséOntario
SJO San José Juan Santamaria Intl - ONT Ontario
SJOONT
San José Juan Santamaria Intl
Tue 10/6
1:25 pm-12:46 pm
2 stops24h 21m
Ontario
Fri 10/16
6:32 pm-7:15 am
1 stop11h 43m
$533
San JoséOntario
SJO San José Juan Santamaria Intl - ONT Ontario
SJOONT
San José Juan Santamaria Intl
Wed 11/18
8:45 am-8:15 pm
2 stops13h 30m
Ontario
Thu 12/3
1:33 pm-1:15 pm
2 stops21h 42m
$533
San JoséOntario
SJO San José Juan Santamaria Intl - ONT Ontario
SJOONT
San José Juan Santamaria Intl
Fri 10/2
7:55 am-10:51 pm
2 stops15h 56m
Ontario
Fri 10/9
6:00 am-7:15 am
1 stop24h 15m
$533
San JoséOntario
SJO San José Juan Santamaria Intl - ONT Ontario
SJOONT
San José Juan Santamaria Intl
Mon 11/2
8:45 am-8:15 pm
2 stops13h 30m
Ontario
Sat 11/7
4:17 pm-11:25 am
2 stops17h 08m
$533
Showing 1-10 of 36 resultsSorted by cheapest first
Best time to book a flight from Costa Rica to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Costa Rica with our price prediction graph.
SJO-ONT
LIR-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 Costa Rica to Ontario
CR0-ONT
SJO-ONT
LIR-ONT
What is the cheapest month to book a flight from Costa Rica to Ontario?
Currently, January is the cheapest month in which you can book a flight from Costa Rica to Ontario (average of $327). Flying from Costa Rica to Ontario in June is currently the most expensive (average of $617). 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 far ahead should I book a flight from Costa Rica to Ontario?
To ensure you get the cheapest price possible for a flight from Costa Rica to Ontario, you should look to book at least 8 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated August 19, 2026.
Read through reviews of airlines operating flights from Costa Rica to Ontario, such as United Airlines and Avianca. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.1
Boarding
7.7
Food
6.7
Entertainment
7.1
Comfort
7.3
Overall
7.4
Reviews
1 / 20
10.0
ExcellentAnonymous,Sep 2025
FRA - SFO
Crew
8.1
Boarding
7.7
Food
6.7
Entertainment
7.1
Comfort
7.3
Overall
7.4
Reviews
1 / 20
10.0
ExcellentAnonymous,Sep 2025
FRA - SFO
Crew
8.1
Boarding
7.7
Food
6.7
Entertainment
7.1
Comfort
7.3
Overall
7.4
Reviews
1 / 20
10.0
ExcellentAnonymous,Sep 2025
FRA - SFO
Related info for your journey
Find useful and relevant information for your journey from Costa Rica 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
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Alternative routes for Costa Rica 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 Costa Rica to Ontario by cabin class
Find flights from Costa Rica 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 August 19, 2026.
Costa Rica and Ontario flights
Browse other Costa Rica and Ontario flight options. Last updated on August 19, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from Costa Rica to Ontario
Discover the top 2 airlines that operate flights from Costa Rica to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$267 | Average$385 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$361 | Average$430 | FlexibilityNo cancel fee | On-time71% |