$335+ Cheap flights from Ontario (ONT) to Portugal
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIS
Nov 7 — Nov 141
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
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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 October 8, 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 October 8, 2026.
This American Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1610:30 pm -
2 stops25h 10m
Mon 11/238:40 pm -
2 stops21h 07m
Deal found 10/6![American Airlines logo]()
$783
This United Airlines deal was found by Cheapflights users on 10/3. 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.
Wed 11/187:00 am -
2 stops18h 30m
Wed 11/256:00 am -
2 stops20h 47m
Deal found 10/3![United Airlines logo]()
$784
This Delta deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” 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 12/96:00 am -
2 stops18h 15m
Fri 12/255:00 am -
2 stops25h 09m
Deal found 10/7![Delta logo]()
$785
This Delta deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” 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 12/96:00 am -
2 stops18h 15m
Thu 12/245:55 am -
2 stops20h 05m
Deal found 10/7![Delta logo]()
$793
This Iberia deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” 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 11/107:00 am -
2 stops16h 40m
Wed 11/188:40 pm -
2 stops21h 07m
Deal found 10/8![Iberia logo]()
$794
This Delta deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” 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 11/237:05 am -
2 stops17h 55m
Thu 12/35:30 am -
2 stops26h 27m
Deal found 10/8![Delta logo]()
$800
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” 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 11/71:29 pm -
3 stops36h 36m
Wed 1/1310:15 am -
2 stops20h 00m
Deal found 10/8![United Airlines logo]()
$804
This Delta deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” 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 11/612:16 pm -
2 stops59h 44m
Wed 1/1311:30 am -
2 stops36h 42m
Deal found 10/8![Delta logo]()
$805
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” 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 12/137:00 am -
2 stops18h 30m
Wed 12/2312:35 pm -
2 stops41h 59m
Deal found 10/7![United Airlines logo]()
$805
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” 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 11/71:29 pm -
2 stops36h 36m
Fri 1/1510:15 am -
2 stops20h 00m
Deal found 10/8![United Airlines logo]()
$816
This United Airlines deal was found by Cheapflights users on 10/4. 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.
Wed 11/256:00 am -
2 stops18h 10m
Wed 12/210:15 am -
2 stops19h 44m
Deal found 10/4![United Airlines logo]()
$827
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/147:00 am -
2 stops18h 30m
Thu 12/2412:35 pm -
2 stops40h 25m
Deal found 10/7![United Airlines logo]()
$828
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 October 8, 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 October 8, 2026.
This American Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1610:30 pm -
2 stops25h 10m
Mon 11/238:40 pm -
2 stops21h 07m
Deal found 10/6![American Airlines logo]()
$783
This United Airlines deal was found by Cheapflights users on 10/3. 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.
Wed 11/187:00 am -
2 stops18h 30m
Wed 11/256:00 am -
2 stops20h 47m
Deal found 10/3![United Airlines logo]()
$784
This Delta deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” 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 11/512:16 pm -
2 stops18h 54m
Wed 11/115:00 am -
2 stops20h 16m
Deal found 10/7![Delta logo]()
$831
This Turkish Airlines deal was found by Cheapflights users on 10/3. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/13:00 pm -
2 stops24h 35m
Thu 4/86:00 am -
2 stops24h 15m
Deal found 10/3![Multiple Airlines logo]()
$1,433
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” 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 12/137:00 am -
2 stops18h 30m
Wed 12/2312:35 pm -
2 stops41h 59m
Deal found 10/7![United Airlines logo]()
$805
This Delta deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 2/287:00 am -
2 stops19h 30m
Mon 4/265:00 am -
2 stops20h 17m
Deal found 10/6![Delta logo]()
$840
This United Airlines deal was found by Cheapflights users on 10/4. 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.
Wed 11/256:00 am -
2 stops18h 10m
Wed 12/210:15 am -
2 stops19h 44m
Deal found 10/4![United Airlines logo]()
$827
This United Airlines deal was found by Cheapflights users on 10/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:00 am -
2 stops18h 30m
Mon 11/96:00 am -
2 stops22h 51m
Deal found 10/5![United Airlines logo]()
$834
This United Airlines deal was found by Cheapflights users on 10/4. 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.
Wed 12/26:00 am -
2 stops19h 30m
Sun 12/66:00 am -
2 stops22h 38m
Deal found 10/4![United Airlines logo]()
$841
This United Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 11/56:00 am -
2 stops18h 10m
Tue 11/1710:15 am -
2 stops18h 36m
Deal found 10/6![United Airlines logo]()
$843
This Delta deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 12/1711:57 am -
2 stops21h 33m
Tue 1/55:30 am -
2 stops25h 13m
Deal found 10/6![Delta logo]()
$1,179
This United Airlines deal was found by Cheapflights users on 10/4. 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.
Tue 10/206:00 am -
2 stops19h 45m
Tue 11/36:00 am -
2 stops22h 51m
Deal found 10/4![United Airlines logo]()
$866
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” 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 11/25:00 am -
2 stops21h 20m
Sun 2/710:15 am -
2 stops18h 10m
Deal found 10/8![United Airlines logo]()
$868
This United Airlines deal was found by Cheapflights users on 10/3. 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 11/147:00 am -
2 stops18h 30m
Sat 11/216:00 am -
2 stops22h 15m
Deal found 10/3![United Airlines logo]()
$884
This United Airlines deal was found by Cheapflights users on 10/4. 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.
Tue 12/157:00 am -
2 stops17h 10m
Tue 1/1212:50 pm -
2 stops38h 00m
Deal found 10/4![United Airlines logo]()
$900
This United Airlines deal was found by Cheapflights users on 10/4. 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.
Tue 12/157:00 am -
2 stops17h 10m
Wed 1/611:20 am -
2 stops38h 15m
Deal found 10/4![United Airlines logo]()
$1,032
This United Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/77:00 am -
2 stops18h 30m
Fri 12/116:00 am -
2 stops22h 38m
Deal found 10/6![United Airlines logo]()
$1,047
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” 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 11/226:37 pm -
2 stops30h 53m
Wed 11/2512:35 pm -
2 stops30h 08m
Deal found 10/7![United Airlines logo]()
$1,056
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” 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 11/226:37 pm -
2 stops30h 53m
Thu 11/2612:35 pm -
2 stops40h 16m
Deal found 10/7![United Airlines logo]()
$1,072
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:00 am -
2 stops18h 10m
Mon 11/1611:55 am -
2 stops18h 53m
Deal found 10/7![United Airlines logo]()
$1,108
This United Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 11/146:00 am -
2 stops18h 10m
Mon 11/1610:15 am -
2 stops18h 36m
Deal found 10/6![United Airlines logo]()
$1,304
This United Airlines deal was found by Cheapflights users on 10/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/165:45 am -
2 stops18h 25m
Mon 12/2811:55 am -
2 stops18h 58m
Deal found 10/5![United Airlines logo]()
$1,404
Last-minute flights from Ontario to PortugalDiscover last-minute flight deals from Ontario to Portugal. Data last updated October 8, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Portugal. Data last updated October 8, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 10/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2912:01 pm -
2 stops20h 54m
Thu 11/55:55 pm -
2 stops33h 35m
Deal found 10/4![Multiple Airlines logo]()
$829
This United Airlines deal was found by Cheapflights users on 10/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:00 am -
2 stops18h 30m
Mon 11/96:00 am -
2 stops22h 51m
Deal found 10/5![United Airlines logo]()
$834
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/49:25 am -
2 stops20h 05m
Wed 1/1311:20 am -
2 stops41h 40m
Deal found 10/8![United Airlines logo]()
$841
This Delta deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” 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 11/56:20 am -
2 stops24h 50m
Thu 1/145:00 am -
2 stops25h 43m
Deal found 10/8![Delta logo]()
$831
This Delta deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” 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 11/612:16 pm -
2 stops59h 44m
Wed 1/1311:30 am -
2 stops36h 42m
Deal found 10/8![Delta logo]()
$805
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” 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 11/71:29 pm -
3 stops36h 36m
Wed 1/1310:15 am -
2 stops20h 00m
Deal found 10/8![United Airlines logo]()
$804
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” 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 11/71:29 pm -
2 stops36h 36m
Fri 1/1510:15 am -
2 stops20h 00m
Deal found 10/8![United Airlines logo]()
$816
This Iberia deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” 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 11/107:00 am -
2 stops16h 40m
Wed 11/188:40 pm -
2 stops21h 07m
Deal found 10/8![Iberia logo]()
$794
This American Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1610:30 pm -
2 stops25h 10m
Mon 11/238:40 pm -
2 stops21h 07m
Deal found 10/6![American Airlines logo]()
$783
This United Airlines deal was found by Cheapflights users on 10/3. 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.
Wed 11/187:00 am -
2 stops18h 30m
Wed 11/256:00 am -
2 stops20h 47m
Deal found 10/3![United Airlines logo]()
$784
This Delta deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” 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 11/237:05 am -
2 stops17h 55m
Thu 12/35:30 am -
2 stops26h 27m
Deal found 10/8![Delta logo]()
$800
This United Airlines deal was found by Cheapflights users on 10/4. 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.
Wed 11/256:00 am -
2 stops18h 10m
Wed 12/210:15 am -
2 stops19h 44m
Deal found 10/4![United Airlines logo]()
$827
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 October 8, 2026.
Search for one-way flight options from Ontario to Portugal. Find affordable one-way fares based on user searches. Data last updated October 8, 2026.
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” 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 3/155:00 am -
2 stops21h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![United Airlines logo]()
$335
This Delta deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” 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 3/1511:55 am -
2 stops27h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Delta logo]()
$339
This American Airlines deal was found by Cheapflights users on 10/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/146:00 am -
2 stops17h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![American Airlines logo]()
$340
This United Airlines deal was found by Cheapflights users on 10/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/146:35 pm -
3 stops33h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![United Airlines logo]()
$354
This oojo deal was found by Cheapflights users on 10/4. 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.
Mon 2/112:45 pm -
2 stops22h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![British Airways logo]()
$374
This oojo deal was found by Cheapflights users on 10/4. 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.
Mon 3/222:22 pm -
2 stops24h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![British Airways logo]()
$376
This United Airlines deal was found by Cheapflights users on 10/4. 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 1/115:00 am -
2 stops19h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![United Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 10/4. 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 2/16:37 pm -
3 stops30h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![United Airlines logo]()
$392
This United Airlines deal was found by Cheapflights users on 10/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/31:00 pm -
2 stops36h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![United Airlines logo]()
$393
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” 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 1/52:00 pm -
2 stops32h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![United Airlines logo]()
$399
This Delta deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 1/1612:00 pm -
2 stops36h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Delta logo]()
$403
This United Airlines deal was found by Cheapflights users on 10/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/316:00 am -
2 stops18h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![United Airlines logo]()
$429
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 October 8, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $728 (United Airlines) |
One-way from | $335 (United Airlines) |
Popular in | June |
Cheapest in | January |
Average price | $869 |
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 October 8, 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
OntarioPorto
ONT Ontario - OPO Porto
ONTOPO
Ontario
Mon 3/15
5:00 am-9:30 am
2 stops21h 30m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$335
OntarioPorto
ONT Ontario - OPO Porto
ONTOPO
Ontario
Mon 3/15
11:55 am-10:00 pm
2 stops27h 05m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$339
OntarioLisbon
ONT Ontario - LIS Lisbon Humberto Delgado
ONTLIS
Ontario
Mon 1/11
5:00 am-8:10 am
2 stops19h 10m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$384
Quickest round-trip
OntarioLisbon
ONT Ontario - LIS Lisbon Humberto Delgado
ONTLIS
Ontario
Sun 1/17
7:00 am-8:00 am
2 stops17h 00m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$384
OntarioLisbon
ONT Ontario - LIS Lisbon Humberto Delgado
ONTLIS
Ontario
Wed 1/20
6:00 am-8:10 am
2 stops18h 10m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$384
OntarioLisbon
ONT Ontario - LIS Lisbon Humberto Delgado
ONTLIS
Ontario
Mon 2/1
6:37 pm-9:20 am
3 stops30h 43m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$392
OntarioPorto
ONT Ontario - OPO Porto
ONTOPO
Ontario
Sat 4/3
1:00 pm-9:45 am
2 stops36h 45m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$393
OntarioLisbon
ONT Ontario - LIS Lisbon Humberto Delgado
ONTLIS
Ontario
Sat 1/16
12:00 pm-8:00 am
2 stops36h 00m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$403
OntarioLisbon
ONT Ontario - LIS Lisbon Humberto Delgado
ONTLIS
Ontario
Wed 11/4
6:00 am-10:20 am
2 stops20h 20m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$463
OntarioPorto
ONT Ontario - OPO Porto
ONTOPO
Ontario
Sat 11/7
4:17 pm-9:30 am
2 stops33h 13m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$484
Showing 1-10 of 42 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
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
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 October 8, 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.
Comfort
7.3
Crew
8.1
Food
6.7
Boarding
7.7
Overall
7.4
Entertainment
7.1
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Comfort
7.3
Crew
8.1
Food
6.7
Boarding
7.7
Overall
7.4
Entertainment
7.1
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Related info for your journey
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Alternative routes for Ontario to Portugal
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Complete your trip
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Ontario and Portugal flights
Browse other Ontario and Portugal flight options. Last updated on October 8, 2026.
Popular flight searches
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Ontario to Portugal flights
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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 October 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$727 | Average$1,177 | FlexibilityNo cancel fee | On-time69% |