$323+ Cheap flights from O'Hare Intl (ORD) to Porto (OPO)
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 7/20. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OPO
Jul 12 — Jul 191
Round-trip
1 adult, Economy
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Cheapest flights from O'Hare Intl to PortoExplore the most affordable flight options available from O'Hare Intl to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2026.
Explore the most affordable flight options available from O'Hare Intl to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2026.
This Justfly.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:15 pm
ORD
- OPO
1 stop33h 50m
Scandinavian Airlines
Wed 11/1111:55 am
OPO
- ORD
1 stop34h 50m
Scandinavian Airlines
Deal found 6/10![Scandinavian Airlines logo]()
$607
This Scandinavian Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/318:15 pm
ORD
- OPO
1 stop33h 50m
Scandinavian Airlines
Wed 11/1111:55 am
OPO
- ORD
1 stop34h 50m
Scandinavian Airlines
Deal found 6/9![Scandinavian Airlines logo]()
$660
This FlightHub deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:15 pm
ORD
- OPO
1 stop33h 50m
Scandinavian Airlines
Mon 11/1611:55 am
OPO
- ORD
1 stop34h 50m
Scandinavian Airlines
Deal found 6/10![Scandinavian Airlines logo]()
$667
This FlightHub deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:15 pm
ORD
- OPO
1 stop33h 50m
Scandinavian Airlines
Mon 11/911:55 am
OPO
- ORD
1 stop34h 50m
Scandinavian Airlines
Deal found 6/10![Scandinavian Airlines logo]()
$677
This Scandinavian Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/318:15 pm
ORD
- OPO
1 stop33h 50m
Scandinavian Airlines
Sat 11/1412:00 pm
OPO
- ORD
1 stop34h 45m
Scandinavian Airlines
Deal found 6/9![Scandinavian Airlines logo]()
$690
This Scandinavian Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:15 pm
ORD
- OPO
1 stop33h 50m
Scandinavian Airlines
Fri 11/135:45 pm
OPO
- ORD
1 stop29h 00m
Scandinavian Airlines
Deal found 6/9![Scandinavian Airlines logo]()
$700
This oojo deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:10 pm
ORD
- OPO
1 stop11h 20m
TAP AIR PORTUGAL
Sat 11/146:00 pm
OPO
- ORD
1 stop27h 30m
TAP AIR PORTUGAL
Deal found 6/11![TAP AIR PORTUGAL logo]()
$711
This oojo deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:10 pm
ORD
- OPO
1 stop15h 50m
TAP AIR PORTUGAL
Sun 11/87:00 am
OPO
- ORD
1 stop14h 30m
TAP AIR PORTUGAL
Deal found 6/10![TAP AIR PORTUGAL logo]()
$713
This Travelocity deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:15 pm
ORD
- OPO
2 stops20h 45m
Scandinavian Airlines
Sat 11/1412:00 pm
OPO
- ORD
1 stop34h 45m
Scandinavian Airlines
Deal found 6/11![Scandinavian Airlines logo]()
$715
This FlightHub deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:10 pm
ORD
- OPO
1 stop16h 50m
TAP AIR PORTUGAL
Thu 11/128:00 pm
OPO
- ORD
1 stop25h 30m
TAP AIR PORTUGAL
Deal found 6/9![TAP AIR PORTUGAL logo]()
$717
This oojo deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/294:40 pm
ORD
- OPO
1 stop16h 20m
TAP AIR PORTUGAL
Tue 8/259:15 pm
OPO
- ORD
1 stop23h 30m
TAP AIR PORTUGAL
Deal found 6/11![TAP AIR PORTUGAL logo]()
$721
This oojo deal was found by Cheapflights users on 6/8. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:00 pm
ORD
- OPO
1 stop15h 15m
TAP AIR PORTUGAL
Wed 9/29:15 pm
OPO
- ORD
1 stop21h 25m
TAP AIR PORTUGAL
Deal found 6/8![TAP AIR PORTUGAL logo]()
$723
Best flights from O'Hare Intl to PortoDiscover carefully curated flight deals from O'Hare Intl to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2026.
Discover carefully curated flight deals from O'Hare Intl to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2026.
This Turkish Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/108:15 pm
ORD
- OPO
1 stop31h 40m
Turkish Airlines
Tue 11/174:25 pm
OPO
- ORD
1 stop23h 35m
Turkish Airlines
Deal found 6/10![Turkish Airlines logo]()
$753
This TAP AIR PORTUGAL deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/68:10 pm
ORD
- OPO
1 stop19h 50m
TAP AIR PORTUGAL
Thu 12/108:00 pm
OPO
- ORD
1 stop25h 30m
TAP AIR PORTUGAL
Deal found 6/11![TAP AIR PORTUGAL logo]()
$788
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/304:20 pm
ORD
- OPO
1 stop12h 20m
Delta
Wed 12/95:00 am
OPO
- ORD
2 stops19h 32m
Delta
Deal found 6/11![Delta logo]()
$895
This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/39:30 pm
ORD
- OPO
1 stop26h 45m
United Airlines
Wed 8/1211:20 am
OPO
- ORD
1 stop26h 31m
United Airlines
Deal found 6/9![United Airlines logo]()
$958
This Delta deal was found by Cheapflights users on 6/8. 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.
Wed 9/235:10 pm
ORD
- OPO
2 stops16h 15m
Delta
Wed 10/75:00 am
OPO
- ORD
2 stops21h 20m
Delta
Deal found 6/8![Delta logo]()
$909
This Delta deal was found by Cheapflights users on 6/7. 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.
Tue 10/65:45 pm
ORD
- OPO
2 stops15h 40m
Delta
Fri 10/165:00 am
OPO
- ORD
2 stops19h 32m
Delta
Deal found 6/7![Delta logo]()
$909
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Fri 7/246:30 am
ORD
- OPO
2 stops18h 30m
United Airlines
Fri 7/316:00 am
OPO
- ORD
1 stop19h 55m
United Airlines
Deal found 6/8![United Airlines logo]()
$1,024
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/162:07 pm
ORD
- OPO
2 stops19h 18m
Delta
Thu 7/235:00 am
OPO
- ORD
1 stop15h 15m
Delta
Deal found 6/11![Delta logo]()
$1,023
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/269:00 am
ORD
- OPO
2 stops15h 55m
United Airlines
Sun 8/212:10 pm
OPO
- ORD
1 stop13h 45m
United Airlines
Deal found 6/11![United Airlines logo]()
$1,154
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/162:07 pm
ORD
- OPO
2 stops19h 18m
Delta
Thu 7/305:55 am
OPO
- ORD
1 stop15h 15m
Delta
Deal found 6/10![Delta logo]()
$1,030
This Delta deal was found by Cheapflights users on 6/8. 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 7/305:18 pm
ORD
- OPO
2 stops16h 07m
Delta
Wed 8/55:55 am
OPO
- ORD
2 stops16h 22m
Delta
Deal found 6/8![Delta logo]()
$1,040
This Delta deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:20 pm
ORD
- OPO
2 stops18h 55m
Delta
Mon 9/75:00 am
OPO
- ORD
2 stops21h 55m
Delta
Deal found 6/12![Delta logo]()
$1,102
Last-minute flights from O'Hare Intl to PortoDiscover last-minute flight deals from O'Hare Intl to Porto. Data last updated June 12, 2026 and is based on user searches.
Discover last-minute flight deals from O'Hare Intl to Porto. Data last updated June 12, 2026 and is based on user searches.
This oojo deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/84:40 pm
ORD
- OPO
1 stop11h 30m
TAP AIR PORTUGAL
Wed 7/1510:30 pm
OPO
- ORD
1 stop20h 10m
TAP AIR PORTUGAL
Deal found 6/10![TAP AIR PORTUGAL logo]()
$827
This oojo deal was found by Cheapflights users on 6/8. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/94:45 pm
ORD
- OPO
1 stop16h 15m
TAP AIR PORTUGAL
Thu 7/165:05 am
OPO
- ORD
1 stop13h 35m
TAP AIR PORTUGAL
Deal found 6/8![TAP AIR PORTUGAL logo]()
$818
This oojo deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/116:05 pm
ORD
- OPO
1 stop14h 55m
TAP AIR PORTUGAL
Fri 7/175:05 am
OPO
- ORD
1 stop16h 55m
TAP AIR PORTUGAL
Deal found 6/12![TAP AIR PORTUGAL logo]()
$845
This Gotogate deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/164:45 pm
ORD
- OPO
1 stop25h 55m
TAP AIR PORTUGAL
Thu 7/235:05 am
OPO
- ORD
1 stop13h 35m
TAP AIR PORTUGAL
Deal found 6/11![TAP AIR PORTUGAL logo]()
$832
This Gotogate deal was found by Cheapflights users on 6/8. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:00 pm
ORD
- OPO
1 stop17h 00m
TAP AIR PORTUGAL
Wed 7/295:05 am
OPO
- ORD
1 stop15h 40m
TAP AIR PORTUGAL
Deal found 6/8![TAP AIR PORTUGAL logo]()
$811
This lol.travel deal was found by Cheapflights users on 6/8. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/266:00 pm
ORD
- OPO
1 stop17h 00m
TAP AIR PORTUGAL
Tue 8/119:15 pm
OPO
- ORD
1 stop24h 45m
TAP AIR PORTUGAL
Deal found 6/8![TAP AIR PORTUGAL logo]()
$754
This oojo deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/294:40 pm
ORD
- OPO
1 stop16h 20m
TAP AIR PORTUGAL
Tue 8/259:15 pm
OPO
- ORD
1 stop23h 30m
TAP AIR PORTUGAL
Deal found 6/11![TAP AIR PORTUGAL logo]()
$721
This Mytrip deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/293:45 pm
ORD
- OPO
2 stops23h 35m
Multiple Airlines
Tue 8/258:25 am
OPO
- ORD
2 stops34h 54m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$831
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/316:00 pm
ORD
- OPO
1 stop14h 30m
TAP AIR PORTUGAL
Tue 8/1110:30 pm
OPO
- ORD
1 stop23h 30m
TAP AIR PORTUGAL
Deal found 6/9![TAP AIR PORTUGAL logo]()
$822
One-way flights from O'Hare Intl to PortoSearch for one-way flight options from O'Hare Intl to Porto. Find affordable one-way fares based on user searches. Data last updated June 12, 2026.
Search for one-way flight options from O'Hare Intl to Porto. Find affordable one-way fares based on user searches. Data last updated June 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2010:25 pm
ORD
- OPO
3 stops43h 25m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1210:25 pm
ORD
- OPO
2 stops40h 00m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2210:25 pm
ORD
- OPO
3 stops52h 35m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1110:25 pm
ORD
- OPO
3 stops39h 40m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/115:13 pm
ORD
- OPO
3 stops55h 57m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$345
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2210:25 pm
ORD
- OPO
3 stops26h 30m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1711:45 am
ORD
- OPO
3 stops51h 40m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$351
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/107:25 pm
ORD
- OPO
3 stops31h 45m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$353
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1110:25 pm
ORD
- OPO
3 stops26h 25m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$354
Find flight deals from O'Hare Intl to Porto
Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $607 (FlightHub) |
One-way from | $323 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $982 |
Cheapflights Fare Finder
Customize your flight search to find flights from O'Hare Intl to Porto 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 June 12, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Porto that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Tue 11/10
8:15 pm-9:55 am
1 stop31h 40m
Porto
Tue 11/17
4:25 pm-10:00 am
1 stop23h 35m
$753
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Sun 12/6
8:10 pm-10:00 pm
1 stop19h 50m
Porto
Thu 12/10
8:00 pm-3:30 pm
1 stop25h 30m
$788
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Sun 8/30
4:20 pm-10:40 am
1 stop12h 20m
Porto
Wed 12/9
5:00 am-6:32 pm
2 stops19h 32m
$895
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Wed 9/23
5:10 pm-3:25 pm
2 stops16h 15m
Porto
Wed 10/7
5:00 am-8:20 pm
2 stops21h 20m
$909
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Tue 10/6
5:45 pm-3:25 pm
2 stops15h 40m
Porto
Fri 10/16
5:00 am-6:32 pm
2 stops19h 32m
$909
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Mon 8/3
9:30 pm-6:15 am
1 stop26h 45m
Porto
Wed 8/12
11:20 am-7:51 am
1 stop26h 31m
$958
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Thu 7/16
2:07 pm-3:25 pm
2 stops19h 18m
Porto
Thu 7/23
5:00 am-2:15 pm
1 stop15h 15m
$1,023
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Fri 7/24
6:30 am-7:00 am
2 stops18h 30m
Porto
Fri 7/31
6:00 am-7:55 pm
1 stop19h 55m
$1,024
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Thu 7/16
2:07 pm-3:25 pm
2 stops19h 18m
Porto
Thu 7/30
5:55 am-3:10 pm
1 stop15h 15m
$1,030
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Thu 7/30
5:18 pm-3:25 pm
2 stops16h 07m
Porto
Wed 8/5
5:55 am-4:17 pm
2 stops16h 22m
$1,040
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from O'Hare Intl to Porto
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from O'Hare Intl to Porto in June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-Porto flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Chicago O'Hare Intl Airport-Porto flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-Porto flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-Porto flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from O'Hare Intl to Porto
Have a flexible travel schedule? Discover the best time to fly to Porto from O'Hare Intl with our price prediction graph.
ORD-OPO
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 Chicago O'Hare Intl Airport to Porto
Prices
Delays
How far ahead should I book a flight from Chicago O'Hare Intl Airport to Porto?
The best time to book flights from Chicago O'Hare Intl Airport to Porto is 76 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Porto?
Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Porto (average of $557). Flying from Chicago O'Hare Intl Airport to Porto in June is currently the most expensive (average of $982). 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.
How much does it cost to fly round-trip from Chicago O'Hare Intl Airport to Porto?
How often are flights from Chicago to Porto delayed?
About 100% of weekly flights between Chicago and Porto have experienced delays in the past year, with the average delay time being 319 minutes.
What is the most punctual flight time for Chicago to Porto flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
Reviews of airlines servicing Porto
Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated June 12, 2026.
Peruse reviews from past customers who have flown with KLM,United Airlines, andTAP AIR PORTUGAL from Chicago O'Hare Intl Airport to Porto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.2
Overall
7.8
Crew
8.4
Comfort
7.7
Boarding
7.8
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Entertainment
7.2
Overall
7.8
Crew
8.4
Comfort
7.7
Boarding
7.8
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Entertainment
7.2
Overall
7.8
Crew
8.4
Comfort
7.7
Boarding
7.8
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Entertainment
7.2
Overall
7.8
Crew
8.4
Comfort
7.7
Boarding
7.8
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Entertainment
7.2
Overall
7.8
Crew
8.4
Comfort
7.7
Boarding
7.8
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Entertainment
7.2
Overall
7.8
Crew
8.4
Comfort
7.7
Boarding
7.8
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Related info for your journey
Find useful and relevant information for your journey from O'Hare Intl to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra
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O'Hare Intl and Porto flights
Browse other O'Hare Intl and Porto flight options. Last updated on June 12, 2026.
Other flights from O'Hare Intl
Browse through other flights departing from O'Hare Intl. Flights are based on user searches made on Cheapflights and were last updated on June 12, 2026.
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Other flights to Porto
Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 12, 2026.
Top 6 airlines flying from O'Hare Intl to Porto
Discover the top 6 airlines that operate flights from O'Hare Intl to Porto. 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 June 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$450 | Average$739 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$497 | Average$748 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$507 | Average$610 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$524 | Average$809 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$531 | Average$698 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$684 | Average$727 | FlexibilityNo cancel fee | On-time77% |