$231+ Cheap flights from Ontario (ONT) to Costa Rica
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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJO
Oct 1 — Oct 81
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Costa Rica 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 Ontario to Costa Rica
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Cheapest flights from Ontario to Costa RicaExplore the most affordable flight options available from Ontario to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 1, 2026.
Explore the most affordable flight options available from Ontario to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 1, 2026.
This Southwest deal was found by Cheapflights users on 8/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/158:45 pm -
2 stops15h 05m
Thu 11/192:45 pm -
1 stop9h 15m
Deal found 8/28![Southwest logo]()
$500
This American Airlines deal was found by Cheapflights users on 8/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2811:59 pm -
1 stop11h 47m
Fri 12/113:54 pm -
2 stops18h 45m
Deal found 8/27![American Airlines logo]()
$521
This Southwest deal was found by Cheapflights users on 8/29. 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.
Thu 12/35:00 pm -
2 stops18h 50m
Mon 12/72:45 pm -
1 stop9h 15m
Deal found 8/29![Southwest logo]()
$526
This Southwest deal was found by Cheapflights users on 8/27. 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.
Sat 11/288:05 pm -
2 stops14h 05m
Fri 12/111:20 pm -
2 stops21h 30m
Deal found 8/27![Southwest logo]()
$531
This Southwest deal was found by Cheapflights users on 8/30. 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 9/293:35 pm -
2 stops20h 10m
Tue 10/69:00 am -
2 stops12h 50m
Deal found 8/30![Southwest logo]()
$539
This Southwest deal was found by Cheapflights users on 8/31. 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 12/66:50 pm -
2 stops15h 30m
Sun 12/131:20 pm -
2 stops20h 25m
Deal found 8/31![Southwest logo]()
$544
This Southwest deal was found by Cheapflights users on 8/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:40 am -
2 stops12h 00m
Fri 10/239:00 am -
2 stops15h 50m
Deal found 8/28![Southwest logo]()
$550
This Southwest deal was found by Cheapflights users on 8/31. 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 11/72:50 pm -
2 stops20h 25m
Sun 11/151:20 pm -
2 stops20h 25m
Deal found 8/31![Southwest logo]()
$565
This Southwest deal was found by Cheapflights users on 8/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:40 am -
2 stops12h 05m
Fri 10/21:30 pm -
2 stops11h 25m
Deal found 8/28![Southwest logo]()
$571
This American Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:00 am -
2 stops12h 21m
Sat 10/311:00 pm -
1 stop9h 11m
Deal found 9/1![American Airlines logo]()
$573
This United Airlines deal was found by Cheapflights users on 8/28. 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 10/164:03 pm -
1 stop14h 12m
Fri 10/231:25 pm -
1 stop9h 34m
Deal found 8/28![United Airlines logo]()
$580
This American Airlines deal was found by Cheapflights users on 8/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/122:22 pm -
1 stop22h 38m
Mon 10/191:00 pm -
1 stop21h 35m
Deal found 8/28![American Airlines logo]()
$581
Best flights from Ontario to Costa RicaDiscover carefully curated flight deals from Ontario to Costa Rica that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 1, 2026.
Discover carefully curated flight deals from Ontario to Costa Rica that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 1, 2026.
This Southwest deal was found by Cheapflights users on 8/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:40 am -
2 stops12h 05m
Fri 10/21:30 pm -
2 stops11h 25m
Deal found 8/28![Southwest logo]()
$571
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/241:52 pm -
1 stop16h 23m
Sun 9/278:45 am -
1 stop15h 14m
Deal found 8/31![United Airlines logo]()
$700
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/201:53 pm -
1 stop16h 22m
Sun 9/278:45 am -
1 stop15h 14m
Deal found 8/31![United Airlines logo]()
$700
This United Airlines deal was found by Cheapflights users on 8/28. 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.
Mon 9/146:08 am -
2 stops12h 29m
Thu 9/248:45 am -
1 stop15h 14m
Deal found 8/28![United Airlines logo]()
$705
This United Airlines deal was found by Cheapflights users on 8/28. 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 9/111:18 pm -
2 stops22h 03m
Fri 9/188:45 am -
1 stop12h 16m
Deal found 8/28![United Airlines logo]()
$705
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:29 pm -
2 stops29h 10m
Wed 11/189:40 am -
1 stop10h 21m
Deal found 8/27![United Airlines logo]()
$726
This United Airlines deal was found by Cheapflights users on 8/30. 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 12/31:40 pm -
2 stops28h 59m
Thu 12/108:45 am -
1 stop15h 14m
Deal found 8/30![United Airlines logo]()
$726
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/135:45 am -
1 stop10h 52m
Fri 12/188:45 am -
1 stop15h 26m
Deal found 8/27![United Airlines logo]()
$734
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/195:00 am -
2 stops30h 10m
Thu 10/221:20 pm -
2 stops23h 58m
Deal found 8/27![United Airlines logo]()
$739
This United Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/191:18 pm -
2 stops22h 03m
Thu 9/248:45 am -
1 stop15h 14m
Deal found 9/1![United Airlines logo]()
$760
This United Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/231:56 pm -
2 stops21h 25m
Sat 9/268:45 am -
1 stop10h 01m
Deal found 9/1![United Airlines logo]()
$760
This United Airlines deal was found by Cheapflights users on 8/31. 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 11/61:32 pm -
2 stops19h 53m
Tue 11/108:45 am -
1 stop14h 55m
Deal found 8/31![United Airlines logo]()
$760
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/135:45 am -
1 stop10h 52m
Sat 12/192:20 pm -
1 stop9h 51m
Deal found 8/27![United Airlines logo]()
$761
This United Airlines deal was found by Cheapflights users on 8/31. 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 10/24:03 pm -
2 stops19h 07m
Tue 10/61:20 pm -
2 stops22h 03m
Deal found 8/31![United Airlines logo]()
$766
This United Airlines deal was found by Cheapflights users on 8/31. 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 1/111:00 pm -
2 stops22h 10m
Mon 1/188:35 am -
1 stop15h 05m
Deal found 8/31![United Airlines logo]()
$766
This United Airlines deal was found by Cheapflights users on 8/30. 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 2/166:00 am -
1 stop10h 37m
Thu 2/188:35 am -
1 stop14h 46m
Deal found 8/30![United Airlines logo]()
$777
This United Airlines deal was found by Cheapflights users on 8/28. 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.
Mon 10/126:00 am -
1 stop29h 21m
Mon 11/1612:35 pm -
2 stops25h 54m
Deal found 8/28![United Airlines logo]()
$784
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/215:00 am -
2 stops30h 10m
Sun 10/2511:50 am -
1 stop10h 01m
Deal found 8/27![United Airlines logo]()
$809
This United Airlines deal was found by Cheapflights users on 8/28. 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.
Mon 11/305:00 am -
2 stops30h 10m
Sat 12/52:20 pm -
1 stop9h 39m
Deal found 8/28![United Airlines logo]()
$809
Last-minute flights from Ontario to Costa RicaDiscover last-minute flight deals from Ontario to Costa Rica. Data last updated September 1, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Costa Rica. Data last updated September 1, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/182:22 pm -
2 stops20h 37m
Fri 9/252:57 pm -
2 stops21h 50m
Deal found 8/28![American Airlines logo]()
$585
This United Airlines deal was found by Cheapflights users on 8/30. 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 9/246:32 pm -
1 stop11h 43m
Thu 10/18:45 am -
1 stop15h 06m
Deal found 8/30![United Airlines logo]()
$609
This Southwest deal was found by Cheapflights users on 8/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:40 am -
2 stops12h 05m
Fri 10/21:30 pm -
2 stops11h 25m
Deal found 8/28![Southwest logo]()
$571
This American Airlines deal was found by Cheapflights users on 8/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/252:22 pm -
1 stop22h 35m
Fri 10/21:00 pm -
1 stop23h 47m
Deal found 8/28![American Airlines logo]()
$604
This American Airlines deal was found by Cheapflights users on 8/30. 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.
Sun 9/271:04 pm -
2 stops23h 53m
Sun 10/41:00 pm -
2 stops21h 10m
Deal found 8/30![American Airlines logo]()
$590
This Southwest deal was found by Cheapflights users on 8/30. 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 9/293:35 pm -
2 stops20h 10m
Tue 10/69:00 am -
2 stops12h 50m
Deal found 8/30![Southwest logo]()
$539
This American Airlines deal was found by Cheapflights users on 8/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/122:22 pm -
1 stop22h 38m
Mon 10/191:00 pm -
1 stop21h 35m
Deal found 8/28![American Airlines logo]()
$581
This American Airlines deal was found by Cheapflights users on 8/30. 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.
Mon 10/1211:59 pm -
2 stops12h 19m
Tue 10/202:44 pm -
2 stops19h 26m
Deal found 8/30![American Airlines logo]()
$602
This American Airlines deal was found by Cheapflights users on 8/30. 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.
Wed 10/1411:59 pm -
1 stop12h 44m
Wed 10/212:44 pm -
2 stops28h 59m
Deal found 8/30![American Airlines logo]()
$651
This Southwest deal was found by Cheapflights users on 8/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:40 am -
2 stops12h 00m
Fri 10/239:00 am -
2 stops15h 50m
Deal found 8/28![Southwest logo]()
$550
This United Airlines deal was found by Cheapflights users on 8/28. 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 10/164:03 pm -
1 stop14h 12m
Fri 10/231:25 pm -
1 stop9h 34m
Deal found 8/28![United Airlines logo]()
$580
This American Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:00 am -
2 stops12h 21m
Sat 10/311:00 pm -
1 stop9h 11m
Deal found 9/1![American Airlines logo]()
$573
One-way flights from Ontario to Costa RicaSearch for one-way flight options from Ontario to Costa Rica. Find affordable one-way fares based on user searches. Data last updated September 1, 2026.
Search for one-way flight options from Ontario to Costa Rica. Find affordable one-way fares based on user searches. Data last updated September 1, 2026.
This Southwest deal was found by Cheapflights users on 8/31. 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 12/15:00 pm -
2 stops17h 20m
Deal found 8/31![Southwest logo]()
$231
This Southwest deal was found by Cheapflights users on 8/31. 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 11/176:25 pm -
2 stops16h 50m
Deal found 8/31![Southwest logo]()
$232
This Southwest deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:40 am -
2 stops13h 00m
Deal found 9/1![Southwest logo]()
$258
This American Airlines deal was found by Cheapflights users on 8/31. 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.
Mon 10/2611:59 pm -
1 stop13h 01m
Deal found 8/31![American Airlines logo]()
$264
This United Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/151:56 pm -
2 stops21h 25m
Deal found 9/1![United Airlines logo]()
$269
This American Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1112:42 pm -
2 stops22h 19m
Deal found 9/1![American Airlines logo]()
$273
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:15 am -
3 stops29h 00m
Deal found 9/1![Multiple Airlines logo]()
$282
This Priceline deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1810:39 pm -
1 stop13h 06m
Deal found 9/1![JetBlue logo]()
$290
This CheapOair deal was found by Cheapflights users on 8/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/122:07 am -
1 stop19h 52m
Deal found 8/28![Multiple Airlines logo]()
$322
This United Airlines deal was found by Cheapflights users on 8/31. 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 11/111:35 pm -
1 stop16h 57m
Deal found 8/31![United Airlines logo]()
$324
This United Airlines deal was found by Cheapflights users on 8/31. 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 12/76:40 pm -
2 stops16h 30m
Deal found 8/31![United Airlines logo]()
$351
This United Airlines deal was found by Cheapflights users on 8/30. 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 9/279:25 am -
2 stops25h 45m
Deal found 8/30![United Airlines logo]()
$357
Find flight deals from Ontario to Costa Rica
Keep the following information in mind while searching for Ontario to Costa Rica flight deals. Data was last updated September 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $500 (Southwest) |
One-way from | $231 (Southwest) |
Popular in | December |
Cheapest in | February |
Average price | $524 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Costa Rica 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 1, 2026.
Use the filters below to find and compare flights from Ontario to Costa Rica that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Fri 9/25
5:40 am-6:45 pm
2 stops12h 05m
San José Juan Santamaria Intl
Fri 10/2
1:30 pm-11:55 pm
2 stops11h 25m
$571
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Thu 9/24
1:52 pm-7:15 am
1 stop16h 23m
San José Juan Santamaria Intl
Sun 9/27
8:45 am-10:59 pm
1 stop15h 14m
$700
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Sun 9/20
1:53 pm-7:15 am
1 stop16h 22m
San José Juan Santamaria Intl
Sun 9/27
8:45 am-10:59 pm
1 stop15h 14m
$700
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Mon 9/14
6:08 am-7:37 pm
2 stops12h 29m
San José Juan Santamaria Intl
Thu 9/24
8:45 am-10:59 pm
1 stop15h 14m
$705
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Fri 9/11
1:18 pm-12:21 pm
2 stops22h 03m
San José Juan Santamaria Intl
Fri 9/18
8:45 am-8:01 pm
1 stop12h 16m
$705
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Tue 11/10
1:29 pm-8:39 pm
2 stops29h 10m
San José Juan Santamaria Intl
Wed 11/18
9:40 am-6:01 pm
1 stop10h 21m
$726
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Thu 12/3
1:40 pm-8:39 pm
2 stops28h 59m
San José Juan Santamaria Intl
Thu 12/10
8:45 am-9:59 pm
1 stop15h 14m
$726
OntarioLiberia
ONT Ontario - LIR Liberia
ONTLIR
Ontario
Sun 12/13
5:45 am-6:37 pm
1 stop10h 52m
Liberia
Fri 12/18
8:45 am-10:11 pm
1 stop15h 26m
$734
OntarioLiberia
ONT Ontario - LIR Liberia
ONTLIR
Ontario
Mon 10/19
5:00 am-12:10 pm
2 stops30h 10m
Liberia
Thu 10/22
1:20 pm-12:18 pm
2 stops23h 58m
$739
OntarioSan José
ONT Ontario - SJO San José Juan Santamaria Intl
ONTSJO
Ontario
Sat 9/19
1:18 pm-12:21 pm
2 stops22h 03m
San José Juan Santamaria Intl
Thu 9/24
8:45 am-10:59 pm
1 stop15h 14m
$760
Showing 1-10 of 37 resultsSorted by cheapest first
Best time to book a flight from Ontario to Costa Rica
Have a flexible travel schedule? Discover the best time to fly to Costa Rica from Ontario with our price prediction graph.
ONT-LIR
ONT-SJO
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 Costa Rica
ONT-CR0
ONT-LIR
ONT-SJO
What is the cheapest month to book a flight from Ontario to Costa Rica?
Currently, October is the cheapest month in which you can book a flight from Ontario to Costa Rica (average of $371). Flying from Ontario to Costa Rica in July is currently the most expensive (average of $783). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Reviews of airlines servicing Costa Rica
Get insights into the airlines that provide service to Costa Rica. 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 Costa Rica. Reviews last updated September 1, 2026.
See what other customers who have flown with United Airlines,American Airlines, andAvianca from Ontario to Costa Rica have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.1
Entertainment
7.1
Food
6.7
Comfort
7.3
Overall
7.4
Boarding
7.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Crew
8.1
Entertainment
7.1
Food
6.7
Comfort
7.3
Overall
7.4
Boarding
7.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Crew
8.1
Entertainment
7.1
Food
6.7
Comfort
7.3
Overall
7.4
Boarding
7.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Crew
8.1
Entertainment
7.1
Food
6.7
Comfort
7.3
Overall
7.4
Boarding
7.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Related info for your journey
Find useful and relevant information for your journey from Ontario to Costa Rica. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Ontario to Costa Rica
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Costa Rica by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Costa Rica by cabin class
Find flights from Ontario to Costa Rica, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Costa Rica flights
Browse other Ontario and Costa Rica flight options. Last updated on September 1, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Ontario to Costa Rica
Discover the top 3 airlines that operate flights from Ontario to Costa Rica. 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 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$371 | Average$509 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$393 | Average$489 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$404 | Average$529 | FlexibilityNo cancel fee | On-time71% |