$232+ Cheap flights from O'Hare Intl (ORD) to Porto (OPO)
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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OPO
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Find cheap flights from O'Hare Intl to Porto 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 O'Hare Intl to Porto
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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 September 10, 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 September 10, 2026.
This Iberia deal was found by Cheapflights users on 9/9. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/184:55 pm -
1 stop12h 50m
Tue 11/38:20 am -
1 stop12h 35m
Deal found 9/9![Multiple Airlines logo]()
$577
This British Airways deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/189:15 pm -
1 stop17h 20m
Tue 11/38:40 pm -
2 stops26h 15m
Deal found 9/9![British Airways logo]()
$587
This Expedia deal was found by Cheapflights users on 9/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/135:40 pm -
1 stop12h 05m
Wed 11/188:20 am -
1 stop12h 35m
Deal found 9/8![Iberia logo]()
$607
This Rumbo deal was found by Cheapflights users on 9/6. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:05 pm -
1 stop23h 10m
Fri 10/308:30 am -
1 stop13h 00m
Deal found 9/6![TAP AIR PORTUGAL logo]()
$618
This Expedia deal was found by Cheapflights users on 9/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:05 pm -
1 stop19h 55m
Wed 11/188:40 pm -
2 stops21h 43m
Deal found 9/8![Multiple Airlines logo]()
$624
This Booking.com deal was found by Cheapflights users on 9/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:00 pm -
1 stop20h 25m
Thu 10/296:00 pm -
1 stop27h 30m
Deal found 9/9![TAP AIR PORTUGAL logo]()
$625
This Booking.com deal was found by Cheapflights users on 9/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:00 pm -
1 stop23h 10m
Wed 10/215:05 am -
1 stop16h 55m
Deal found 9/7![TAP AIR PORTUGAL logo]()
$626
This Booking.com deal was found by Cheapflights users on 9/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:00 pm -
1 stop23h 30m
Sun 12/67:00 am -
1 stop14h 30m
Deal found 9/7![TAP AIR PORTUGAL logo]()
$627
This Mytrip deal was found by Cheapflights users on 9/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:00 pm -
1 stop14h 00m
Wed 11/185:00 am -
1 stop16h 30m
Deal found 9/6![TAP AIR PORTUGAL logo]()
$629
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:10 pm -
1 stop15h 50m
Sun 11/85:00 am -
1 stop16h 30m
Deal found 9/9![TAP AIR PORTUGAL logo]()
$631
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sun 10/257:50 pm -
1 stop17h 40m
Sun 11/16:00 am -
1 stop13h 10m
Deal found 9/10![Multiple Airlines logo]()
$633
This oojo deal was found by Cheapflights users on 9/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:00 pm -
1 stop12h 30m
Tue 12/18:00 pm -
1 stop25h 30m
Deal found 9/7![TAP AIR PORTUGAL logo]()
$634
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 September 10, 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 September 10, 2026.
This United deal was found by Cheapflights users on 9/6. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/265:55 am -
2 stops22h 35m
Tue 11/176:00 am -
1 stop13h 10m
Deal found 9/6![Multiple Airlines logo]()
$721
This United Airlines deal was found by Cheapflights users on 9/6. 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 12/72:00 pm -
2 stops13h 30m
Fri 12/116:00 am -
1 stop15h 20m
Deal found 9/6![United Airlines logo]()
$764
This Delta deal was found by Cheapflights users on 9/7. 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.
Sun 11/16:10 am -
1 stop20h 05m
Sun 11/85:00 am -
2 stops21h 30m
Deal found 9/7![Delta logo]()
$778
This Turkish Airlines deal was found by Cheapflights users on 9/6. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/308:10 pm -
1 stop31h 30m
Tue 12/224:25 pm -
1 stop23h 35m
Deal found 9/6![Turkish Airlines logo]()
$852
This Booking.com deal was found by Cheapflights users on 9/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1011:05 am -
2 stops16h 05m
Sat 10/177:50 pm -
2 stops23h 05m
Deal found 9/10![Multiple Airlines logo]()
$763
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Sun 11/17:00 am -
2 stops20h 30m
Sun 11/86:00 am -
1 stop13h 10m
Deal found 9/8![United Airlines logo]()
$776
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Wed 12/210:55 am -
2 stops16h 35m
Sun 12/66:00 am -
2 stops19h 05m
Deal found 9/7![United Airlines logo]()
$811
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:05 am -
1 stop20h 40m
Wed 10/76:00 am -
1 stop14h 55m
Deal found 9/10![United Airlines logo]()
$860
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/267:55 pm -
1 stop31h 50m
Wed 10/76:00 am -
1 stop14h 55m
Deal found 9/10![United Airlines logo]()
$873
This United Airlines deal was found by Cheapflights users on 9/8. 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 10/238:45 am -
1 stop16h 25m
Fri 10/3012:35 pm -
1 stop13h 30m
Deal found 9/8![United Airlines logo]()
$883
Last-minute flights from O'Hare Intl to PortoDiscover last-minute flight deals from O'Hare Intl to Porto. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from O'Hare Intl to Porto. Data last updated September 10, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 9/10. 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 10/129:20 pm -
2 stops27h 40m
Wed 10/286:00 am -
1 stop20h 05m
Deal found 9/10![Multiple Airlines logo]()
$679
This Booking.com deal was found by Cheapflights users on 9/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:00 pm -
1 stop23h 10m
Wed 10/215:05 am -
1 stop16h 55m
Deal found 9/7![TAP AIR PORTUGAL logo]()
$626
This Rumbo deal was found by Cheapflights users on 9/6. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:05 pm -
1 stop23h 10m
Fri 10/308:30 am -
1 stop13h 00m
Deal found 9/6![TAP AIR PORTUGAL logo]()
$618
This Iberia deal was found by Cheapflights users on 9/9. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/184:55 pm -
1 stop12h 50m
Tue 11/38:20 am -
1 stop12h 35m
Deal found 9/9![Multiple Airlines logo]()
$577
This British Airways deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/189:15 pm -
1 stop17h 20m
Tue 11/38:40 pm -
2 stops26h 15m
Deal found 9/9![British Airways logo]()
$587
This Booking.com deal was found by Cheapflights users on 9/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:00 pm -
1 stop20h 25m
Thu 10/296:00 pm -
1 stop27h 30m
Deal found 9/9![TAP AIR PORTUGAL logo]()
$625
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sun 10/257:50 pm -
1 stop17h 40m
Sun 11/16:00 am -
1 stop13h 10m
Deal found 9/10![Multiple Airlines logo]()
$633
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/255:20 pm -
1 stop13h 20m
Sun 11/16:00 am -
1 stop13h 10m
Deal found 9/10![United Airlines logo]()
$672
This Mytrip deal was found by Cheapflights users on 9/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:00 pm -
1 stop14h 00m
Wed 11/185:00 am -
1 stop16h 30m
Deal found 9/6![TAP AIR PORTUGAL logo]()
$629
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 September 10, 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 September 10, 2026.
This Air France deal was found by Cheapflights users on 9/6. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:00 pm -
1 stop10h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Air France logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sun 10/257:30 pm -
2 stops36h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$325
This Mytrip deal was found by Cheapflights users on 9/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/187:25 pm -
2 stops19h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 11/266:30 pm -
3 stops44h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:30 pm -
3 stops47h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$346
This Mytrip deal was found by Cheapflights users on 9/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:30 pm -
2 stops21h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$352
This deal was found by Cheapflights users on 9/10. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/303:43 pm -
1 stop11h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![United Airlines logo]()
$360
This Booking.com deal was found by Cheapflights users on 9/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/286:50 pm -
1 stop17h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![SWISS logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/98:11 pm -
2 stops54h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$368
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/43:50 pm -
2 stops58h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$374
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 September 10, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $574 (Expedia) |
One-way from | $232 (Air France) |
Popular in | June |
Cheapest in | January |
Average price | $880 |
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 7,457,451 searches. Data last updated September 10, 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 Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Sun 10/18
10:25 pm-12:55 pm
3 stops32h 30m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$351
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Mon 11/2
5:40 pm-6:45 am
1 stop31h 05m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$392
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Tue 10/13
7:05 pm-5:35 pm
1 stop16h 30m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$436
Quickest round-trip
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Mon 12/28
3:43 pm-9:30 am
1 stop11h 47m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$453
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Wed 10/14
8:45 am-7:00 am
1 stop16h 15m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$462
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Sun 10/18
10:30 am-10:25 am
1 stop17h 55m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$463
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Tue 10/13
9:00 am-9:45 am
2 stops18h 45m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$463
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Wed 9/23
2:00 pm-11:40 am
2 stops15h 40m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$473
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Sat 10/17
7:52 pm-9:45 am
1 stop31h 53m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$476
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Mon 11/16
1:35 pm-10:35 am
2 stops15h 00m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$534
Showing 1-10 of 20 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 September.
| 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
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 44 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 $564). Flying from Chicago O'Hare Intl Airport to Porto in June is currently the most expensive (average of $1,291). 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?
Airfare is below average for this route at the moment.
Chicago O'Hare Intl Airport to Porto flights typically cost between $738 and $990 in March.The cheapest round-trip price found within the last 5 days was $574 on Multiple Airlines (Mar 2-Mar 23).
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 September 10, 2026.
Peruse reviews from past customers who have flown with Turkish Airlines,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.
Crew
7.8
Comfort
7.3
Entertainment
7.5
Food
7.5
Boarding
7.3
Overall
7.4
Reviews
1 / 20
8.0
ExcellentMuhammad,Jan 2026
ORD - DFW
Crew
7.8
Comfort
7.3
Entertainment
7.5
Food
7.5
Boarding
7.3
Overall
7.4
Reviews
1 / 20
8.0
ExcellentMuhammad,Jan 2026
ORD - DFW
Crew
7.8
Comfort
7.3
Entertainment
7.5
Food
7.5
Boarding
7.3
Overall
7.4
Reviews
1 / 20
8.0
ExcellentMuhammad,Jan 2026
ORD - DFW
Crew
7.8
Comfort
7.3
Entertainment
7.5
Food
7.5
Boarding
7.3
Overall
7.4
Reviews
1 / 20
8.0
ExcellentMuhammad,Jan 2026
ORD - DFW
Crew
7.8
Comfort
7.3
Entertainment
7.5
Food
7.5
Boarding
7.3
Overall
7.4
Reviews
1 / 20
8.0
ExcellentMuhammad,Jan 2026
ORD - DFW
Crew
7.8
Comfort
7.3
Entertainment
7.5
Food
7.5
Boarding
7.3
Overall
7.4
Reviews
1 / 20
8.0
ExcellentMuhammad,Jan 2026
ORD - DFW
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
Arcos de Valdevez
Coimbra
Aveiro
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O'Hare Intl and Porto flights
Browse other O'Hare Intl and Porto flight options. Last updated on September 10, 2026.
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Top 7 airlines flying from O'Hare Intl to Porto
Discover the top 7 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 7,457,451 searches. Data last updated September 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$451 | Average$825 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$474 | Average$689 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$489 | Average$912 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$519 | Average$786 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$524 | Average$990 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$531 | Average$679 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$618 | Average$672 | FlexibilityNo cancel fee | On-time77% |