$384+ Cheap flights from Ontario (ONT) to Portugal
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 12/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIS
Sep 25 — Oct 21
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Portugal 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 Portugal
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Cheapest flights from Ontario to PortugalExplore the most affordable flight options available from Ontario to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 26, 2026.
Explore the most affordable flight options available from Ontario to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 26, 2026.
This United Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 12/65:45 am -
2 stops19h 45m
Thu 12/106:00 am -
2 stops22h 29m
Deal found 8/21![United Airlines logo]()
$746
This Air Canada deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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 11/95:00 am -
2 stops21h 40m
Tue 11/2411:20 am -
2 stops41h 31m
Deal found 8/26![Air Canada logo]()
$755
This Air Canada deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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.
Sun 11/85:00 am -
2 stops44h 20m
Tue 11/2411:20 am -
2 stops41h 31m
Deal found 8/26![Air Canada logo]()
$760
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 11/186:00 am -
2 stops19h 00m
Wed 11/255:00 am -
2 stops20h 19m
Deal found 8/25![Delta logo]()
$761
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 12/297:05 am -
2 stops17h 55m
Thu 1/145:30 am -
2 stops18h 42m
Deal found 8/25![Delta logo]()
$768
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/74:17 pm -
2 stops31h 53m
Tue 11/2410:15 am -
2 stops18h 36m
Deal found 8/26![United Airlines logo]()
$771
This Air Canada deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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.
Wed 11/115:00 am -
2 stops17h 55m
Fri 11/2711:20 am -
2 stops41h 31m
Deal found 8/26![Air Canada logo]()
$779
This Delta deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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 11/65:03 pm -
2 stops54h 57m
Wed 11/2511:15 am -
2 stops31h 53m
Deal found 8/26![Delta logo]()
$783
This Air Canada deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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.
Sun 11/85:00 am -
2 stops44h 20m
Fri 11/2711:20 am -
2 stops41h 31m
Deal found 8/26![Air Canada logo]()
$784
This Air Canada deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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.
Tue 11/101:29 pm -
2 stops33h 26m
Fri 11/2711:20 am -
2 stops41h 31m
Deal found 8/26![Air Canada logo]()
$785
This United Airlines deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 12/25:45 am -
2 stops19h 45m
Sun 12/66:00 am -
2 stops22h 29m
Deal found 8/24![United Airlines logo]()
$796
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/121:33 pm -
2 stops35h 47m
Fri 1/811:20 am -
2 stops33h 13m
Deal found 8/25![United Airlines logo]()
$814
Best flights from Ontario to PortugalDiscover carefully curated flight deals from Ontario to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.
Discover carefully curated flight deals from Ontario to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 11/186:00 am -
2 stops19h 00m
Thu 11/265:00 am -
2 stops20h 19m
Deal found 8/25![Delta logo]()
$761
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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 1/3111:20 am -
2 stops20h 00m
Thu 2/46:00 am -
3 stops22h 20m
Deal found 8/26![United Airlines logo]()
$767
This KLM deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 11/157:00 am -
2 stops20h 25m
Sat 11/214:10 pm -
2 stops33h 03m
Deal found 8/22![KLM logo]()
$862
This British Airways deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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 12/112:22 pm -
2 stops19h 43m
Sat 1/96:55 pm -
2 stops31h 57m
Deal found 8/26![British Airways logo]()
$1,207
This Icelandair deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1811:05 pm -
2 stops30h 45m
Sun 10/252:00 pm -
2 stops27h 17m
Deal found 8/24![Multiple Airlines logo]()
$1,250
This Delta deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 10/66:20 am -
2 stops24h 35m
Tue 10/135:00 am -
2 stops20h 12m
Deal found 8/22![Delta logo]()
$821
This United Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 12/25:00 am -
3 stops21h 20m
Sun 12/610:15 am -
2 stops18h 05m
Deal found 8/21![United Airlines logo]()
$851
This United Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:07 am -
2 stops19h 13m
Thu 10/2910:15 am -
2 stops18h 25m
Deal found 8/21![United Airlines logo]()
$855
This United Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:07 am -
2 stops19h 13m
Sun 11/110:15 am -
2 stops18h 36m
Deal found 8/23![United Airlines logo]()
$875
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 11/136:00 am -
2 stops18h 10m
Sun 11/1510:15 am -
2 stops18h 36m
Deal found 8/25![United Airlines logo]()
$901
This Justfly.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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.
Sun 9/2010:39 pm -
1 stop25h 06m
Wed 9/235:30 pm -
1 stop34h 27m
Deal found 8/24![Multiple Airlines logo]()
$1,313
This United Airlines deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 11/127:00 am -
2 stops18h 30m
Sat 11/216:00 am -
2 stops22h 15m
Deal found 8/22![United Airlines logo]()
$906
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 9/66:00 am -
2 stops24h 55m
Mon 9/215:00 am -
2 stops25h 40m
Deal found 8/25![Delta logo]()
$1,253
This United Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/61:22 pm -
2 stops33h 38m
Tue 10/1312:15 pm -
2 stops35h 07m
Deal found 8/21![United Airlines logo]()
$913
This Justfly.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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.
Thu 10/110:39 pm -
1 stop25h 06m
Fri 10/95:30 pm -
1 stop35h 44m
Deal found 8/23![Multiple Airlines logo]()
$1,393
This United Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/41:24 pm -
2 stops33h 36m
Sat 10/316:00 am -
2 stops21h 51m
Deal found 8/21![United Airlines logo]()
$932
This Justfly.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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.
Thu 10/110:39 pm -
1 stop25h 06m
Sun 10/115:30 pm -
1 stop35h 44m
Deal found 8/23![Multiple Airlines logo]()
$1,472
This United Airlines deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:00 am -
2 stops18h 10m
Fri 11/1310:15 am -
2 stops18h 36m
Deal found 8/22![United Airlines logo]()
$936
This United Airlines deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 10/711:10 am -
2 stops20h 30m
Wed 10/146:00 am -
2 stops22h 31m
Deal found 8/22![United Airlines logo]()
$937
This United Airlines deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/89:25 am -
2 stops22h 20m
Thu 10/156:00 am -
2 stops22h 31m
Deal found 8/24![United Airlines logo]()
$944
This KLM deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 11/247:00 am -
2 stops18h 30m
Tue 12/12:40 pm -
2 stops33h 42m
Deal found 8/23![KLM logo]()
$2,292
This Delta deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 10/210:00 pm -
2 stops36h 05m
Fri 10/98:50 am -
2 stops35h 46m
Deal found 8/23![Delta logo]()
$2,029
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:00 am -
2 stops18h 20m
Tue 10/1312:20 pm -
2 stops32h 26m
Deal found 8/25![United Airlines logo]()
$1,040
This KLM deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 9/305:15 pm -
2 stops18h 15m
Fri 10/98:50 am -
2 stops21h 53m
Deal found 8/23![KLM logo]()
$2,550
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 11/16:00 am -
2 stops25h 20m
Sun 11/86:00 am -
2 stops20h 47m
Deal found 8/25![United Airlines logo]()
$1,062
This United Airlines deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 2/206:53 pm -
2 stops28h 02m
Mon 3/88:55 am -
3 stops43h 25m
Deal found 8/22![United Airlines logo]()
$1,067
This KAYAK deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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.
Thu 10/11:04 pm -
2 stops43h 26m
Sat 10/104:30 pm -
2 stops53h 46m
Deal found 8/23![British Airways logo]()
$3,507
This United Airlines deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:00 am -
2 stops22h 50m
Thu 10/223:25 pm -
2 stops37h 33m
Deal found 8/24![United Airlines logo]()
$1,071
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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 12/45:00 am -
2 stops23h 35m
Thu 12/106:05 am -
3 stops22h 15m
Deal found 8/26![United Airlines logo]()
$1,077
This United Airlines deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:00 am -
2 stops19h 45m
Sun 10/2512:35 pm -
2 stops37h 12m
Deal found 8/24![United Airlines logo]()
$1,129
Last-minute flights from Ontario to PortugalDiscover last-minute flight deals from Ontario to Portugal. Data last updated August 26, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Portugal. Data last updated August 26, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 9/25:00 am -
2 stops20h 45m
Thu 10/296:00 am -
2 stops21h 51m
Deal found 8/23![United Airlines logo]()
$1,137
This Delta deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/26:00 am -
2 stops24h 55m
Mon 9/75:00 am -
2 stops25h 45m
Deal found 8/22![Delta logo]()
$1,253
This United Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 9/61:56 pm -
2 stops32h 59m
Tue 9/2212:15 pm -
2 stops38h 01m
Deal found 8/23![United Airlines logo]()
$1,074
This Delta deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 9/612:00 pm -
2 stops38h 45m
Wed 9/1610:00 am -
2 stops21h 47m
Deal found 8/21![Delta logo]()
$1,221
This Delta deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 9/612:00 pm -
2 stops38h 45m
Tue 9/1510:00 am -
2 stops33h 05m
Deal found 8/21![Delta logo]()
$1,236
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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 9/146:00 am -
2 stops16h 55m
Tue 10/66:00 am -
2 stops22h 31m
Deal found 8/26![United Airlines logo]()
$1,241
This Iberia deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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.
Tue 9/228:25 am -
2 stops19h 25m
Mon 11/26:50 pm -
2 stops22h 50m
Deal found 8/23![Iberia logo]()
$1,046
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 9/226:00 am -
2 stops19h 45m
Fri 10/26:00 am -
2 stops22h 58m
Deal found 8/25![United Airlines logo]()
$1,161
This United Airlines deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/226:00 am -
2 stops16h 15m
Thu 10/16:00 am -
2 stops22h 31m
Deal found 8/22![United Airlines logo]()
$1,207
This Iberia deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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.
Thu 9/2410:25 am -
2 stops17h 25m
Tue 10/612:30 pm -
2 stops19h 22m
Deal found 8/22![Iberia logo]()
$1,217
This United Airlines deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 9/286:00 am -
2 stops18h 20m
Fri 10/910:25 am -
2 stops18h 33m
Deal found 8/24![United Airlines logo]()
$891
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 9/286:00 am -
2 stops18h 20m
Mon 11/211:55 am -
2 stops18h 53m
Deal found 8/25![United Airlines logo]()
$911
One-way flights from Ontario to PortugalSearch for one-way flight options from Ontario to Portugal. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.
Search for one-way flight options from Ontario to Portugal. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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 -
2 stops18h 25m
Deal found 8/26![United Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 12/86:40 pm -
3 stops28h 15m
Deal found 8/25![United Airlines logo]()
$388
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/125:55 pm -
2 stops30h 05m
Deal found 8/25![Delta logo]()
$390
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 11/304:17 pm -
2 stops35h 28m
Deal found 8/25![United Airlines logo]()
$391
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/812:01 pm -
3 stops49h 44m
Deal found 8/24![Multiple Airlines logo]()
$404
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 12/157:05 am -
2 stops17h 55m
Deal found 8/25![Delta logo]()
$429
This British Airways deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 12/1110:30 am -
2 stops23h 25m
Deal found 8/25![British Airways logo]()
$432
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 12/107:00 am -
2 stops19h 20m
Deal found 8/25![United Airlines logo]()
$434
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 9/216:00 am -
2 stops19h 10m
Deal found 8/25![United Airlines logo]()
$444
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 12/241:38 pm -
2 stops35h 42m
Deal found 8/25![United Airlines logo]()
$450
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 9/227:00 am -
2 stops22h 50m
Deal found 8/25![United Airlines logo]()
$453
This Air Canada deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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.
Wed 12/231:38 pm -
2 stops35h 42m
Deal found 8/25![Air Canada logo]()
$455
Find flight deals from Ontario to Portugal
Keep the following information in mind while searching for Ontario to Portugal flight deals. Data was last updated August 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $746 (United Airlines) |
One-way from | $384 (United Airlines) |
Popular in | July |
Cheapest in | January |
Average price | $1,113 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Portugal 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 August 26, 2026.
Use the filters below to find and compare flights from Ontario to Portugal that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioLisbon
ONT Ontario - LIS Lisbon Humberto Delgado
ONTLIS
Ontario
Wed 11/18
6:00 am-9:00 am
2 stops19h 00m
Lisbon Humberto Delgado
Thu 11/26
5:00 am-5:19 pm
2 stops20h 19m
$761
OntarioPorto
ONT Ontario - OPO Porto
ONTOPO
Ontario
Sun 1/31
11:20 am-3:20 pm
2 stops20h 00m
Porto
Thu 2/4
6:00 am-8:20 pm
3 stops22h 20m
$767
OntarioLisbon
ONT Ontario - LIS Lisbon Humberto Delgado
ONTLIS
Ontario
Tue 10/6
6:20 am-2:55 pm
2 stops24h 35m
Lisbon Humberto Delgado
Tue 10/13
5:00 am-5:12 pm
2 stops20h 12m
$821
OntarioLisbon
ONT Ontario - LIS Lisbon Humberto Delgado
ONTLIS
Ontario
Wed 12/2
5:00 am-10:20 am
3 stops21h 20m
Lisbon Humberto Delgado
Sun 12/6
10:15 am-8:20 pm
2 stops18h 05m
$851
OntarioLisbon
ONT Ontario - LIS Lisbon Humberto Delgado
ONTLIS
Ontario
Thu 10/22
6:07 am-9:20 am
2 stops19h 13m
Lisbon Humberto Delgado
Thu 10/29
10:15 am-9:40 pm
2 stops18h 25m
$855
OntarioPorto
ONT Ontario - OPO Porto
ONTOPO
Ontario
Sun 11/15
7:00 am-11:25 am
2 stops20h 25m
Porto
Sat 11/21
4:10 pm-5:13 pm
2 stops33h 03m
$862
OntarioLisbon
ONT Ontario - LIS Lisbon Humberto Delgado
ONTLIS
Ontario
Thu 10/22
6:07 am-9:20 am
2 stops19h 13m
Lisbon Humberto Delgado
Sun 11/1
10:15 am-8:51 pm
2 stops18h 36m
$875
Quickest round-trip
OntarioLisbon
ONT Ontario - LIS Lisbon Humberto Delgado
ONTLIS
Ontario
Fri 11/13
6:00 am-8:10 am
2 stops18h 10m
Lisbon Humberto Delgado
Sun 11/15
10:15 am-8:51 pm
2 stops18h 36m
$901
OntarioPorto
ONT Ontario - OPO Porto
ONTOPO
Ontario
Thu 11/12
7:00 am-9:30 am
2 stops18h 30m
Porto
Sat 11/21
6:00 am-8:15 pm
2 stops22h 15m
$906
OntarioPorto
ONT Ontario - OPO Porto
ONTOPO
Ontario
Tue 10/6
1:22 pm-7:00 am
2 stops33h 38m
Porto
Tue 10/13
12:15 pm-3:22 pm
2 stops35h 07m
$913
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ontario to Portugal
Have a flexible travel schedule? Discover the best time to fly to Portugal from Ontario with our price prediction graph.
ONT-OPO
ONT-LIS
ONT-FAO
ONT-PDL
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 Portugal
ONT-PT0
ONT-OPO
ONT-LIS
ONT-FAO
ONT-PDL
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing Portugal
Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated August 26, 2026.
See what other customers who have flown with United Airlines from Ontario to Portugal have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
6.7
Overall
7.4
Entertainment
7.1
Crew
8.1
Comfort
7.3
Boarding
7.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Food
6.7
Overall
7.4
Entertainment
7.1
Crew
8.1
Comfort
7.3
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 Portugal. 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 Portugal
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Complete your trip
Complete your trip to Portugal by adding a car rental and/or hotel reservation to your travel itinerary.
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Ontario and Portugal flights
Browse other Ontario and Portugal flight options. Last updated on August 26, 2026.
Popular flight searches
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Ontario to Portugal flights
Consider these flights traveling from Ontario to Portugal.
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Consider these flights traveling to Portugal regions.
Top airline flying from Ontario to Portugal
Discover the top airline that operate flights from Ontario to Portugal. 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 August 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$515 | Average$1,177 | FlexibilityNo cancel fee | On-time69% |