$267+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
Apr 4 — Apr 111
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Greece 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
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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 March 5, 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 March 5, 2026.
This oojo deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/102:59 pm
ONT
- ATH
2 stops18h 31m
British Airways
Tue 11/242:20 pm
ATH
- ONT
2 stops41h 39m
British Airways
Deal found 3/3![British Airways logo]()
$646
This Delta deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 4/11:20 pm
ONT
- ATH
2 stops25h 55m
Delta
Wed 4/89:45 am
ATH
- ONT
1 stop21h 15m
Delta
Deal found 3/2![Delta logo]()
$647
This Delta deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/316:00 am
ONT
- ATH
2 stops31h 00m
Delta
Tue 4/76:00 am
ATH
- ONT
2 stops26h 34m
Delta
Deal found 3/3![Delta logo]()
$648
This American Airlines deal was found by Cheapflights users on 3/1. 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 4/297:30 am
ONT
- ATH
2 stops23h 35m
American Airlines
Wed 5/66:55 am
ATH
- ONT
2 stops26h 51m
American Airlines
Deal found 3/1![American Airlines logo]()
$649
This KLM deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” 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 4/195:05 pm
ONT
- ATH
2 stops22h 10m
KLM
Wed 4/296:00 am
ATH
- ONT
2 stops21h 15m
KLM
Deal found 3/4![KLM logo]()
$652
This Delta deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 4/195:05 pm
ONT
- ATH
2 stops22h 10m
Delta
Wed 4/296:00 am
ATH
- ONT
2 stops27h 44m
Delta
Deal found 3/2![Delta logo]()
$653
This Delta deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 3/810:25 pm
ONT
- ATH
1 stop26h 30m
Delta
Thu 4/26:00 am
ATH
- ONT
2 stops27h 51m
Delta
Deal found 3/2![Delta logo]()
$656
This Delta deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 3/810:25 pm
ONT
- ATH
1 stop26h 30m
Delta
Tue 3/316:00 am
ATH
- ONT
2 stops20h 28m
Delta
Deal found 3/2![Delta logo]()
$657
This Delta deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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 4/195:05 pm
ONT
- ATH
2 stops22h 10m
Delta
Fri 5/16:00 am
ATH
- ONT
2 stops21h 15m
Delta
Deal found 3/3![Delta logo]()
$659
This oojo deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:59 pm
ONT
- ATH
2 stops23h 26m
British Airways
Wed 9/307:00 pm
ATH
- ONT
2 stops34h 55m
British Airways
Deal found 3/3![British Airways logo]()
$663
This Tripair deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Tripair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/612:57 pm
ONT
- ATH
1 stop36h 03m
Multiple Airlines
Wed 4/221:35 pm
ATH
- ONT
2 stops20h 09m
Multiple Airlines
Deal found 3/4![Multiple Airlines logo]()
$665
This oojo deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/712:19 pm
ONT
- SKG
2 stops37h 06m
British Airways
Wed 5/137:00 pm
SKG
- ONT
2 stops33h 37m
British Airways
Deal found 3/4![British Airways logo]()
$898
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 March 5, 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 March 5, 2026.
This United Airlines deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” 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 5/47:00 am
ONT
- ATH
1 stop17h 35m
United Airlines
Mon 5/1112:35 pm
ATH
- ONT
1 stop20h 00m
United Airlines
Deal found 3/4![United Airlines logo]()
$819
This Delta deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” 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 3/1510:25 pm
ONT
- ATH
1 stop26h 30m
Delta
Thu 4/29:45 am
ATH
- ONT
1 stop21h 15m
Delta
Deal found 3/5![Delta logo]()
$875
This KLM deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 4/1910:15 pm
ONT
- SKG
2 stops29h 15m
KLM
Wed 4/2911:20 am
SKG
- ONT
2 stops22h 24m
KLM
Deal found 3/2![KLM logo]()
$910
This British Airways deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” 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.
Thu 7/212:46 pm
ONT
- ATH
2 stops21h 09m
British Airways
Wed 7/1512:00 pm
ATH
- ONT
1 stop19h 57m
British Airways
Deal found 3/5![British Airways logo]()
$1,043
This Air Serbia deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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 6/1411:59 pm
ONT
- SKG
2 stops29h 26m
Air Serbia
Fri 6/264:10 pm
SKG
- ONT
2 stops40h 30m
Air Serbia
Deal found 3/3![Air Serbia logo]()
$1,407
This Turkish Airlines deal was found by Cheapflights users on 3/1. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1012:02 pm
ONT
- SKG
2 stops22h 23m
Multiple Airlines
Fri 6/269:35 am
SKG
- ONT
2 stops23h 36m
Multiple Airlines
Deal found 3/1![Multiple Airlines logo]()
$1,413
This United Airlines deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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 4/257:00 am
ONT
- ATH
1 stop17h 35m
United Airlines
Fri 5/112:45 pm
ATH
- ONT
2 stops39h 16m
United Airlines
Deal found 3/3![United Airlines logo]()
$976
This KLM deal was found by Cheapflights users on 3/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:00 am
ONT
- ATH
1 stop18h 00m
KLM
Thu 9/249:45 am
ATH
- ONT
1 stop18h 16m
KLM
Deal found 3/1![KLM logo]()
$1,082
This Delta deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/310:25 pm
ONT
- ATH
2 stops23h 10m
Delta
Sun 4/121:35 pm
ATH
- ONT
2 stops38h 58m
Delta
Deal found 3/2![Delta logo]()
$1,254
This KLM deal was found by Cheapflights users on 3/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:05 am
ONT
- ATH
1 stop16h 55m
KLM
Tue 5/199:45 am
ATH
- ONT
1 stop18h 51m
KLM
Deal found 3/1![KLM logo]()
$1,203
This oojo deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/141:10 pm
ONT
- SKG
2 stops36h 25m
British Airways
Wed 6/246:50 pm
SKG
- ONT
2 stops35h 06m
British Airways
Deal found 3/5![British Airways logo]()
$1,376
This United Airlines deal was found by Cheapflights users on 3/1. 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.
Mon 4/207:00 am
ONT
- ATH
1 stop17h 35m
United Airlines
Sun 5/312:35 pm
ATH
- ONT
1 stop20h 00m
United Airlines
Deal found 3/1![United Airlines logo]()
$1,275
This oojo deal was found by Cheapflights users on 3/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/71:10 pm
ONT
- SKG
2 stops36h 25m
British Airways
Tue 6/3012:25 pm
SKG
- ONT
2 stops43h 32m
British Airways
Deal found 3/1![British Airways logo]()
$1,381
This KLM deal was found by Cheapflights users on 3/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/87:05 am
ONT
- SKG
2 stops19h 50m
KLM
Wed 5/2011:20 am
SKG
- ONT
2 stops21h 14m
KLM
Deal found 3/1![KLM logo]()
$1,284
This Air Serbia deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” 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 7/1311:59 pm
ONT
- SKG
2 stops41h 11m
Air Serbia
Sun 8/24:10 pm
SKG
- ONT
2 stops40h 30m
Air Serbia
Deal found 3/4![Air Serbia logo]()
$1,671
This Air Serbia deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” 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 7/1411:59 pm
ONT
- SKG
2 stops29h 26m
Air Serbia
Mon 8/34:25 am
SKG
- ONT
2 stops28h 15m
Air Serbia
Deal found 3/4![Air Serbia logo]()
$1,671
This KLM deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” 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.
Tue 3/3110:25 pm
ONT
- ATH
1 stop26h 35m
KLM
Wed 4/89:45 am
ATH
- ONT
1 stop21h 15m
KLM
Deal found 3/5![KLM logo]()
$1,416
This Air Serbia deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” 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 7/1311:59 pm
ONT
- SKG
2 stops29h 26m
Air Serbia
Tue 8/44:10 pm
SKG
- ONT
2 stops40h 30m
Air Serbia
Deal found 3/4![Air Serbia logo]()
$1,671
This KLM deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” 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.
Tue 3/3110:25 pm
ONT
- ATH
1 stop26h 35m
KLM
Thu 4/99:45 am
ATH
- ONT
1 stop21h 15m
KLM
Deal found 3/5![KLM logo]()
$1,416
This Air Serbia deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” 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 7/1411:59 pm
ONT
- SKG
2 stops29h 26m
Air Serbia
Tue 7/284:10 pm
SKG
- ONT
2 stops40h 30m
Air Serbia
Deal found 3/4![Air Serbia logo]()
$1,671
Last-minute flights from Ontario to GreeceDiscover last-minute flight deals from Ontario to Greece. Data last updated March 5, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Greece. Data last updated March 5, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 3/810:25 pm
ONT
- ATH
1 stop26h 30m
Delta
Thu 4/26:00 am
ATH
- ONT
2 stops27h 51m
Delta
Deal found 3/2![Delta logo]()
$656
This Delta deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 3/810:25 pm
ONT
- ATH
1 stop26h 30m
Delta
Tue 3/316:00 am
ATH
- ONT
2 stops20h 28m
Delta
Deal found 3/2![Delta logo]()
$657
This Delta deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/316:00 am
ONT
- ATH
2 stops31h 00m
Delta
Tue 4/76:00 am
ATH
- ONT
2 stops26h 34m
Delta
Deal found 3/3![Delta logo]()
$648
This Delta deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 4/11:20 pm
ONT
- ATH
2 stops25h 55m
Delta
Wed 4/89:45 am
ATH
- ONT
1 stop21h 15m
Delta
Deal found 3/2![Delta logo]()
$647
This Tripair deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Tripair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/612:57 pm
ONT
- ATH
1 stop36h 03m
Multiple Airlines
Wed 4/221:35 pm
ATH
- ONT
2 stops20h 09m
Multiple Airlines
Deal found 3/4![Multiple Airlines logo]()
$665
This KLM deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” 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 4/195:05 pm
ONT
- ATH
2 stops22h 10m
KLM
Wed 4/296:00 am
ATH
- ONT
2 stops21h 15m
KLM
Deal found 3/4![KLM logo]()
$652
This Delta deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 4/195:05 pm
ONT
- ATH
2 stops22h 10m
Delta
Wed 4/296:00 am
ATH
- ONT
2 stops27h 44m
Delta
Deal found 3/2![Delta logo]()
$653
This Delta deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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 4/195:05 pm
ONT
- ATH
2 stops22h 10m
Delta
Fri 5/16:00 am
ATH
- ONT
2 stops21h 15m
Delta
Deal found 3/3![Delta logo]()
$659
This American Airlines deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 4/1911:59 pm
ONT
- SKG
3 stops56h 11m
Multiple Airlines
Wed 4/297:00 pm
SKG
- ONT
3 stops49h 09m
Multiple Airlines
Deal found 3/2![Multiple Airlines logo]()
$899
This KLM deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 4/1910:15 pm
ONT
- SKG
2 stops29h 15m
KLM
Wed 4/2911:20 am
SKG
- ONT
2 stops22h 24m
KLM
Deal found 3/2![KLM logo]()
$910
This KLM deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” 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.
Thu 4/237:05 am
ONT
- SKG
2 stops18h 00m
KLM
Fri 5/112:00 pm
SKG
- ONT
2 stops21h 44m
KLM
Deal found 3/4![KLM logo]()
$2,305
This American Airlines deal was found by Cheapflights users on 3/1. 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 4/297:30 am
ONT
- ATH
2 stops23h 35m
American Airlines
Wed 5/66:55 am
ATH
- ONT
2 stops26h 51m
American Airlines
Deal found 3/1![American Airlines logo]()
$649
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 March 5, 2026.
Search for one-way flight options from Ontario to Greece. Find affordable one-way fares based on user searches. Data last updated March 5, 2026.
This oojo deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/412:46 pm
ONT
- ATH
2 stops19h 19m
British Airways
Deal found 3/2![British Airways logo]()
$267
This Cheapflightsfares deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 7/266:00 am
ONT
- ATH
1 stop19h 45m
British Airways
Deal found 3/2![British Airways logo]()
$272
This oojo deal was found by Cheapflights users on 3/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1110:50 am
ONT
- ATH
2 stops21h 15m
British Airways
Deal found 3/1![British Airways logo]()
$273
This Iberia deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/510:50 am
ONT
- ATH
2 stops20h 15m
Multiple Airlines
Deal found 3/3![Multiple Airlines logo]()
$275
This KLM deal was found by Cheapflights users on 2/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/2510:59 pm
ONT
- ATH
1 stop25h 01m
KLM
Deal found 2/28![KLM logo]()
$277
This United Airlines deal was found by Cheapflights users on 2/28. 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.
Wed 7/226:30 am
ONT
- ATH
2 stops17h 40m
United Airlines
Deal found 2/28![United Airlines logo]()
$281
This Delta deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2111:55 am
ONT
- ATH
2 stops22h 05m
Delta
Deal found 2/28![Delta logo]()
$282
This United Airlines deal was found by Cheapflights users on 2/28. 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 7/201:50 pm
ONT
- ATH
3 stops34h 10m
United Airlines
Deal found 2/28![United Airlines logo]()
$283
This Air Canada deal was found by Cheapflights users on 2/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/205:00 am
ONT
- ATH
2 stops46h 40m
Air Canada
Deal found 2/28![Air Canada logo]()
$286
This oojo deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/14:54 pm
ONT
- ATH
2 stops23h 16m
British Airways
Deal found 3/5![British Airways logo]()
$291
This oojo deal was found by Cheapflights users on 3/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/104:52 pm
ONT
- SKG
2 stops33h 33m
British Airways
Deal found 3/1![British Airways logo]()
$550
This oojo deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/141:10 pm
ONT
- SKG
2 stops36h 25m
British Airways
Deal found 3/5![British Airways logo]()
$579
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 March 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $647 (Delta) |
One-way from | $267 (oojo) |
Popular in | June |
Cheapest in | February |
Average price | $694 |
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 March 5, 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
OntarioAthens
ONT - ATH
ONTATH
Ontario
Mon 5/4
7:00 am-10:35 am
1 stop17h 35m
Athens Eleftherios V.
Mon 5/11
12:35 pm-10:35 pm
1 stop20h 00m
$819
OntarioAthens
ONT - ATH
ONTATH
Ontario
Sun 3/15
10:25 pm-9:55 am
1 stop26h 30m
Athens Eleftherios V.
Thu 4/2
9:45 am-9:00 pm
1 stop21h 15m
$875
OntarioThessaloniki
ONT - SKG
ONTSKG
Ontario
Sun 4/19
10:15 pm-1:30 pm
2 stops29h 15m
Thessaloniki Makedonia
Wed 4/29
11:20 am-11:44 pm
2 stops22h 24m
$910
OntarioAthens
ONT - ATH
ONTATH
Ontario
Sat 4/25
7:00 am-10:35 am
1 stop17h 35m
Athens Eleftherios V.
Fri 5/1
12:45 pm-6:01 pm
2 stops39h 16m
$976
OntarioAthens
ONT - ATH
ONTATH
Ontario
Thu 7/2
12:46 pm-7:55 pm
2 stops21h 09m
Athens Eleftherios V.
Wed 7/15
12:00 pm-9:57 pm
1 stop19h 57m
$1,043
OntarioAthens
ONT - ATH
ONTATH
Ontario
Tue 8/18
7:00 am-11:00 am
1 stop18h 00m
Athens Eleftherios V.
Thu 9/24
9:45 am-6:01 pm
1 stop18h 16m
$1,082
Quickest round-trip
OntarioAthens
ONT - ATH
ONTATH
Ontario
Mon 5/11
7:05 am-10:00 am
1 stop16h 55m
Athens Eleftherios V.
Tue 5/19
9:45 am-6:36 pm
1 stop18h 51m
$1,203
OntarioAthens
ONT - ATH
ONTATH
Ontario
Fri 4/3
10:25 pm-7:35 am
2 stops23h 10m
Athens Eleftherios V.
Sun 4/12
1:35 pm-6:33 pm
2 stops38h 58m
$1,254
OntarioAthens
ONT - ATH
ONTATH
Ontario
Mon 4/20
7:00 am-10:35 am
1 stop17h 35m
Athens Eleftherios V.
Sun 5/3
12:35 pm-10:35 pm
1 stop20h 00m
$1,275
OntarioThessaloniki
ONT - SKG
ONTSKG
Ontario
Fri 5/8
7:05 am-12:55 pm
2 stops19h 50m
Thessaloniki Makedonia
Wed 5/20
11:20 am-10:34 pm
2 stops21h 14m
$1,284
Showing 1-10 of 38 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
What is the cheapest month to book a flight from Ontario to Greece?
Currently, August is the cheapest month in which you can book a flight from Ontario to Greece (average of $420). Flying from Ontario to Greece in June is currently the most expensive (average of $646). 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 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 March 5, 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.
Entertainment
7.1
Overall
7.4
Food
6.6
Crew
8.1
Boarding
7.7
Comfort
7.3
Reviews
1 / 20
4.0
OkayThomas,Mar 2025
SFO - TPE
Entertainment
7.1
Overall
7.4
Food
6.6
Crew
8.1
Boarding
7.7
Comfort
7.3
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.
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Ontario and Greece flights
Browse other Ontario and Greece flight options. Last updated on March 5, 2026.
Popular flight searches
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Ontario to Greece flights
Consider these flights traveling from Ontario to Greece.
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Consider these flights traveling to Greece regions.
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 March 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$603 | Average$836 | FlexibilityNo cancel fee | On-time69% |