$365+ Cheap flights from Ontario (ONT) to Greece
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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Jun 13 — Jun 201
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Greece with Cheapflights
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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
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Cheapest flights from Ontario to GreeceExplore the most affordable flight options available from Ontario to Greece. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 14, 2026.
Explore the most affordable flight options available from Ontario to Greece. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 14, 2026.
This Delta deal was found by Cheapflights users on 5/12. 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.
Sun 8/307:05 am
ONT
- ATH
1 stop17h 55m
Delta
Wed 9/169:45 am
ATH
- ONT
1 stop22h 11m
Delta
Deal found 5/12![Delta logo]()
$814
This British Airways deal was found by Cheapflights users on 5/12. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/127:06 am
ONT
- ATH
1 stop18h 39m
British Airways
Wed 9/22:00 pm
ATH
- ONT
1 stop18h 58m
British Airways
Deal found 5/12![British Airways logo]()
$820
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” 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 9/3012:00 pm
ONT
- ATH
2 stops25h 00m
Delta
Wed 10/710:05 am
ATH
- ONT
2 stops23h 43m
Delta
Deal found 5/13![Delta logo]()
$823
This United Airlines deal was found by Cheapflights users on 5/12. 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.
Wed 10/77:00 am
ONT
- ATH
1 stop17h 35m
United Airlines
Wed 10/211:10 pm
ATH
- ONT
2 stops43h 49m
United Airlines
Deal found 5/12![United Airlines logo]()
$824
This Air Canada deal was found by Cheapflights users on 5/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/145:00 am
ONT
- ATH
2 stops20h 10m
Air Canada
Fri 9/2512:10 pm
ATH
- ONT
2 stops42h 42m
Air Canada
Deal found 5/12![Air Canada logo]()
$833
This United Airlines deal was found by Cheapflights users on 5/12. 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.
Mon 9/147:00 am
ONT
- ATH
2 stops25h 40m
United Airlines
Tue 9/291:10 pm
ATH
- ONT
2 stops43h 16m
United Airlines
Deal found 5/12![United Airlines logo]()
$837
This United Airlines deal was found by Cheapflights users on 5/12. 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.
Tue 9/151:18 pm
ONT
- ATH
2 stops23h 47m
United Airlines
Fri 9/256:00 am
ATH
- ONT
2 stops24h 52m
United Airlines
Deal found 5/12![United Airlines logo]()
$858
This British Airways deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:06 am
ONT
- ATH
1 stop18h 39m
British Airways
Wed 9/22:00 pm
ATH
- ONT
1 stop18h 58m
British Airways
Deal found 5/13![British Airways logo]()
$870
This CheapOair deal was found by Cheapflights users on 5/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/312:46 pm
ONT
- ATH
2 stops20h 44m
British Airways
Tue 11/177:35 am
ATH
- ONT
2 stops26h 22m
British Airways
Deal found 5/10![British Airways logo]()
$872
This British Airways deal was found by Cheapflights users on 5/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/267:06 am
ONT
- ATH
1 stop18h 39m
British Airways
Thu 9/32:05 pm
ATH
- ONT
1 stop18h 53m
British Airways
Deal found 5/10![British Airways logo]()
$878
This Delta deal was found by Cheapflights users on 5/12. 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.
Sun 8/307:05 am
ONT
- ATH
1 stop16h 55m
Delta
Mon 9/146:00 am
ATH
- ONT
2 stops20h 14m
Delta
Deal found 5/12![Delta logo]()
$879
This Justfly.com deal was found by Cheapflights users on 5/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/811:50 pm
ONT
- SKG
2 stops22h 55m
Turkish Airlines
Tue 9/299:15 pm
SKG
- ONT
2 stops32h 58m
Turkish Airlines
Deal found 5/12![Turkish Airlines logo]()
$1,126
Best flights from Ontario to GreeceDiscover carefully curated flight deals from Ontario to Greece that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 14, 2026.
Discover carefully curated flight deals from Ontario to Greece that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 14, 2026.
This KLM deal was found by Cheapflights users on 5/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:00 am
ONT
- ATH
1 stop16h 20m
KLM
Tue 10/139:45 am
ATH
- ONT
1 stop18h 33m
KLM
Deal found 5/9![KLM logo]()
$976
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” 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 6/107:05 am
ONT
- ATH
1 stop17h 55m
Delta
Tue 9/19:45 am
ATH
- ONT
1 stop18h 16m
Delta
Deal found 5/13![Delta logo]()
$1,026
This British Airways deal was found by Cheapflights users on 5/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/77:00 am
ONT
- ATH
1 stop18h 45m
British Airways
Fri 9/412:00 pm
ATH
- ONT
1 stop19h 11m
British Airways
Deal found 5/9![British Airways logo]()
$1,084
This Air Serbia deal was found by Cheapflights users on 5/12. 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 Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:50 pm
ONT
- SKG
2 stops29h 35m
Air Serbia
Tue 9/224:10 pm
SKG
- ONT
2 stops38h 03m
Air Serbia
Deal found 5/12![Air Serbia logo]()
$1,454
This British Airways deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/2211:59 pm
ONT
- ATH
1 stop25h 46m
Multiple Airlines
Wed 7/16:55 am
ATH
- ONT
2 stops27h 04m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$1,484
This United Airlines deal was found by Cheapflights users on 5/10. 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.
Sun 9/137:00 am
ONT
- ATH
1 stop17h 35m
United Airlines
Mon 10/512:35 pm
ATH
- ONT
1 stop19h 51m
United Airlines
Deal found 5/10![United Airlines logo]()
$1,524
This British Airways deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3110:25 am
ONT
- ATH
2 stops23h 10m
British Airways
Fri 8/142:00 pm
ATH
- ONT
1 stop18h 58m
British Airways
Deal found 5/13![British Airways logo]()
$1,090
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” 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 6/47:05 am
ONT
- ATH
1 stop16h 55m
Delta
Wed 9/29:45 am
ATH
- ONT
1 stop18h 16m
Delta
Deal found 5/13![Delta logo]()
$1,225
This KLM deal was found by Cheapflights users on 5/12. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:05 am
ONT
- ATH
1 stop16h 55m
KLM
Sat 8/19:45 am
ATH
- ONT
1 stop18h 38m
KLM
Deal found 5/12![KLM logo]()
$1,236
This KLM deal was found by Cheapflights users on 5/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/257:00 am
ONT
- ATH
1 stop18h 00m
KLM
Tue 10/611:30 am
ATH
- ONT
1 stop20h 44m
KLM
Deal found 5/9![KLM logo]()
$1,382
This Condor deal was found by Cheapflights users on 5/12. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:00 am
ONT
- SKG
2 stops31h 01m
Multiple Airlines
Mon 6/18:10 am
SKG
- ONT
2 stops25h 46m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$1,533
This British Airways deal was found by Cheapflights users on 5/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/65:34 am
ONT
- ATH
1 stop20h 11m
British Airways
Tue 7/1412:00 pm
ATH
- ONT
1 stop20h 34m
British Airways
Deal found 5/10![British Airways logo]()
$1,454
This Air Serbia deal was found by Cheapflights users on 5/12. 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 Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3011:50 pm
ONT
- SKG
2 stops29h 35m
Air Serbia
Sat 9/264:10 pm
SKG
- ONT
2 stops62h 03m
Air Serbia
Deal found 5/12![Air Serbia logo]()
$1,605
This Air Serbia deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1811:50 pm
ONT
- SKG
2 stops29h 35m
Air Serbia
Mon 8/314:10 pm
SKG
- ONT
2 stops40h 25m
Air Serbia
Deal found 5/13![Air Serbia logo]()
$1,613
This KLM deal was found by Cheapflights users on 5/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:00 am
ONT
- ATH
1 stop18h 00m
KLM
Thu 10/19:45 am
ATH
- ONT
1 stop18h 16m
KLM
Deal found 5/9![KLM logo]()
$1,509
This British Airways deal was found by Cheapflights users on 5/12. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/62:15 pm
ONT
- SKG
2 stops21h 00m
British Airways
Tue 7/2112:25 pm
SKG
- ONT
2 stops21h 34m
British Airways
Deal found 5/12![British Airways logo]()
$1,581
This Air Serbia deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1811:50 pm
ONT
- SKG
2 stops29h 35m
Air Serbia
Thu 9/34:10 pm
SKG
- ONT
2 stops40h 25m
Air Serbia
Deal found 5/13![Air Serbia logo]()
$1,613
This KLM deal was found by Cheapflights users on 5/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:00 am
ONT
- ATH
1 stop18h 00m
KLM
Sat 10/109:45 am
ATH
- ONT
1 stop18h 33m
KLM
Deal found 5/9![KLM logo]()
$1,580
This British Airways deal was found by Cheapflights users on 5/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/612:41 pm
ONT
- SKG
2 stops21h 24m
British Airways
Sat 6/1312:15 pm
SKG
- ONT
2 stops21h 36m
British Airways
Deal found 5/9![British Airways logo]()
$1,646
This Air Serbia deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:50 pm
ONT
- SKG
2 stops29h 35m
Air Serbia
Thu 9/34:25 am
SKG
- ONT
2 stops28h 10m
Air Serbia
Deal found 5/13![Air Serbia logo]()
$1,699
This Air Serbia deal was found by Cheapflights users on 5/11. 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 Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1611:50 pm
ONT
- SKG
2 stops29h 35m
Air Serbia
Thu 9/34:10 pm
SKG
- ONT
2 stops40h 25m
Air Serbia
Deal found 5/11![Air Serbia logo]()
$1,707
This Air Serbia deal was found by Cheapflights users on 5/11. 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 Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1811:50 pm
ONT
- SKG
2 stops29h 35m
Air Serbia
Wed 9/24:10 pm
SKG
- ONT
2 stops40h 25m
Air Serbia
Deal found 5/11![Air Serbia logo]()
$1,707
This Air Serbia deal was found by Cheapflights users on 5/11. 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 Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:50 pm
ONT
- SKG
2 stops41h 20m
Air Serbia
Mon 8/314:10 pm
SKG
- ONT
2 stops40h 25m
Air Serbia
Deal found 5/11![Air Serbia logo]()
$1,707
Last-minute flights from Ontario to GreeceDiscover last-minute flight deals from Ontario to Greece. Data last updated May 14, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Greece. Data last updated May 14, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” 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 5/147:00 am
ONT
- ATH
1 stop17h 35m
United Airlines
Wed 5/2012:35 pm
ATH
- ONT
1 stop20h 00m
United Airlines
Deal found 5/13![United Airlines logo]()
$1,034
This United Airlines deal was found by Cheapflights users on 5/9. 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 5/156:00 am
ONT
- ATH
2 stops26h 45m
United Airlines
Tue 5/263:25 pm
ATH
- ONT
2 stops36h 03m
United Airlines
Deal found 5/9![United Airlines logo]()
$1,027
This United Airlines deal was found by Cheapflights users on 5/9. 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 5/151:40 pm
ONT
- ATH
2 stops19h 05m
United Airlines
Fri 5/226:45 am
ATH
- ONT
2 stops21h 11m
United Airlines
Deal found 5/9![United Airlines logo]()
$1,047
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Sun 5/175:00 am
ONT
- ATH
2 stops23h 55m
United Airlines
Tue 5/261:10 pm
ATH
- ONT
2 stops38h 18m
United Airlines
Deal found 5/9![United Airlines logo]()
$967
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Sun 5/175:00 am
ONT
- ATH
2 stops23h 55m
United Airlines
Wed 5/2712:45 pm
ATH
- ONT
2 stops19h 52m
United Airlines
Deal found 5/9![United Airlines logo]()
$987
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Sun 5/175:00 am
ONT
- ATH
2 stops32h 05m
United Airlines
Mon 5/2512:45 pm
ATH
- ONT
2 stops38h 43m
United Airlines
Deal found 5/9![United Airlines logo]()
$998
This KAYAK deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” 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.
Wed 5/201:30 pm
ONT
- ATH
2 stops23h 35m
Lufthansa
Tue 5/266:00 am
ATH
- ONT
2 stops21h 56m
Lufthansa
Deal found 5/13![Lufthansa logo]()
$1,037
This KLM deal was found by Cheapflights users on 5/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/77:05 am
ONT
- ATH
1 stop17h 55m
KLM
Tue 9/112:10 pm
ATH
- ONT
1 stop19h 46m
KLM
Deal found 5/10![KLM logo]()
$1,026
This British Airways deal was found by Cheapflights users on 5/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/77:00 am
ONT
- ATH
1 stop18h 45m
British Airways
Thu 9/32:05 pm
ATH
- ONT
1 stop18h 53m
British Airways
Deal found 5/9![British Airways logo]()
$1,033
This British Airways deal was found by Cheapflights users on 5/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/87:00 am
ONT
- ATH
1 stop18h 45m
British Airways
Wed 9/22:00 pm
ATH
- ONT
1 stop18h 58m
British Airways
Deal found 5/10![British Airways logo]()
$990
This Delta deal was found by Cheapflights users on 5/11. 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 6/87:05 am
ONT
- ATH
1 stop16h 55m
Delta
Thu 9/36:00 am
ATH
- ONT
2 stops20h 14m
Delta
Deal found 5/11![Delta logo]()
$1,031
This Delta deal was found by Cheapflights users on 5/11. 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 6/87:05 am
ONT
- ATH
1 stop16h 55m
Delta
Fri 9/46:35 am
ATH
- ONT
2 stops19h 39m
Delta
Deal found 5/11![Delta logo]()
$1,038
One-way flights from Ontario to GreeceSearch for one-way flight options from Ontario to Greece. Find affordable one-way fares based on user searches. Data last updated May 14, 2026.
Search for one-way flight options from Ontario to Greece. Find affordable one-way fares based on user searches. Data last updated May 14, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:06 am
ONT
- ATH
1 stop18h 39m
British Airways
Deal found 5/13![British Airways logo]()
$365
This Cheapflightsfares deal was found by Cheapflights users on 5/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:00 am
ONT
- ATH
1 stop19h 45m
British Airways
Deal found 5/12![British Airways logo]()
$370
This Cheapflightsfares deal was found by Cheapflights users on 5/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:06 am
ONT
- ATH
1 stop18h 39m
British Airways
Deal found 5/11![British Airways logo]()
$371
This KLM deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/307:05 am
ONT
- ATH
1 stop16h 55m
KLM
Deal found 5/13![KLM logo]()
$377
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” 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 10/2612:00 pm
ONT
- ATH
2 stops19h 30m
Delta
Deal found 5/13![Delta logo]()
$393
This KLM deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/165:06 pm
ONT
- SKG
2 stops17h 19m
KLM
Deal found 5/13![KLM logo]()
$393
This Trip.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/52:43 pm
ONT
- ATH
1 stop35h 02m
Iberia
Deal found 5/13![Iberia logo]()
$400
This CheapOair deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” 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.
Mon 9/211:31 pm
ONT
- ATH
2 stops19h 34m
British Airways
Deal found 5/13![British Airways logo]()
$412
This United Airlines deal was found by Cheapflights users on 5/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:00 am
ONT
- ATH
1 stop17h 35m
United Airlines
Deal found 5/11![United Airlines logo]()
$417
This United Airlines deal was found by Cheapflights users on 5/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/145:00 am
ONT
- ATH
2 stops23h 55m
United Airlines
Deal found 5/11![United Airlines logo]()
$419
This Cheapflightsfares deal was found by Cheapflights users on 5/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:06 am
ONT
- ATH
1 stop18h 39m
British Airways
Deal found 5/12![British Airways logo]()
$425
This Ovago deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1710:29 am
ONT
- SKG
2 stops24h 46m
British Airways
Deal found 5/13![British Airways logo]()
$430
Find flight deals from Ontario to Greece
Keep the following information in mind while searching for Ontario to Greece flight deals. Data was last updated May 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $814 (Delta) |
One-way from | $365 (Cheapflightsfares) |
Popular in | June |
Cheapest in | February |
Average price | $911 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Greece 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 May 14, 2026.
Use the filters below to find and compare flights from Ontario to Greece that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
OntarioAthens
ONT - ATH
ONTATH
Ontario
Sat 10/3
7:00 am-9:20 am
1 stop16h 20m
Athens Eleftherios V.
Tue 10/13
9:45 am-6:18 pm
1 stop18h 33m
$976
OntarioAthens
ONT - ATH
ONTATH
Ontario
Wed 6/10
7:05 am-11:00 am
1 stop17h 55m
Athens Eleftherios V.
Tue 9/1
9:45 am-6:01 pm
1 stop18h 16m
$1,026
OntarioAthens
ONT - ATH
ONTATH
Ontario
Sun 6/7
7:00 am-11:45 am
1 stop18h 45m
Athens Eleftherios V.
Fri 9/4
12:00 pm-9:11 pm
1 stop19h 11m
$1,084
OntarioAthens
ONT - ATH
ONTATH
Ontario
Fri 7/31
10:25 am-7:35 pm
2 stops23h 10m
Athens Eleftherios V.
Fri 8/14
2:00 pm-10:58 pm
1 stop18h 58m
$1,090
OntarioAthens
ONT - ATH
ONTATH
Ontario
Thu 6/4
7:05 am-10:00 am
1 stop16h 55m
Athens Eleftherios V.
Wed 9/2
9:45 am-6:01 pm
1 stop18h 16m
$1,225
OntarioAthens
ONT - ATH
ONTATH
Ontario
Sun 7/19
7:05 am-10:00 am
1 stop16h 55m
Athens Eleftherios V.
Sat 8/1
9:45 am-6:23 pm
1 stop18h 38m
$1,236
OntarioAthens
ONT - ATH
ONTATH
Ontario
Fri 9/25
7:00 am-11:00 am
1 stop18h 00m
Athens Eleftherios V.
Tue 10/6
11:30 am-10:14 pm
1 stop20h 44m
$1,382
OntarioThessaloniki
ONT - SKG
ONTSKG
Ontario
Mon 8/24
11:50 pm-3:25 pm
2 stops29h 35m
Thessaloniki Makedonia
Tue 9/22
4:10 pm-8:13 pm
2 stops38h 03m
$1,454
OntarioAthens
ONT - ATH
ONTATH
Ontario
Mon 7/6
5:34 am-11:45 am
1 stop20h 11m
Athens Eleftherios V.
Tue 7/14
12:00 pm-10:34 pm
1 stop20h 34m
$1,454
OntarioAthens
ONT - ATH
ONTATH
Ontario
Mon 6/22
11:59 pm-11:45 am
1 stop25h 46m
Athens Eleftherios V.
Wed 7/1
6:55 am-11:59 pm
2 stops27h 04m
$1,484
Showing 1-10 of 44 resultsSorted by cheapest first
Best time to book a flight from Ontario to Greece
Have a flexible travel schedule? Discover the best time to fly to Greece from Ontario with our price prediction graph.
ONT-ATH
ONT-SKG
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 Greece
ONT-GR0
ONT-ATH
ONT-SKG
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing Greece
Get insights into the airlines that provide service to Greece. 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 Greece. Reviews last updated May 14, 2026.
Read reviews from past customers who have flown United Airlines from Ontario to Greece. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.1
Comfort
7.3
Food
6.6
Overall
7.4
Boarding
7.7
Entertainment
7.1
Reviews
1 / 20
4.0
OkayThomas,Mar 2025
SFO - TPE
Crew
8.1
Comfort
7.3
Food
6.6
Overall
7.4
Boarding
7.7
Entertainment
7.1
Reviews
1 / 20
4.0
OkayThomas,Mar 2025
SFO - TPE
Related info for your journey
Find useful and relevant information for your journey from Ontario to Greece. 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 Greece
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Complete your trip
Complete your trip to Greece by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Greece by cabin class
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Ontario and Greece flights
Browse other Ontario and Greece flight options. Last updated on May 14, 2026.
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Ontario to Greece flights
Consider these flights traveling from Ontario to Greece.
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Top airline flying from Ontario to Greece
Discover the top airline that operate flights from Ontario to Greece. 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 May 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$588 | Average$823 | FlexibilityNo cancel fee | On-time69% |