$357+ 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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OPO
May 29 — Jun 51
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 April 29, 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 April 29, 2026.
This oojo deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/311:25 am
ORD
- OPO
1 stop22h 20m
Turkish Airlines
Wed 9/164:40 pm
OPO
- ORD
1 stop23h 00m
Turkish Airlines
Deal found 4/28![Turkish Airlines logo]()
$704
This oojo deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:10 pm
ORD
- OPO
1 stop37h 35m
Turkish Airlines
Wed 9/94:40 pm
OPO
- ORD
1 stop23h 00m
Turkish Airlines
Deal found 4/28![Turkish Airlines logo]()
$707
This Turkish Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/208:10 pm
ORD
- OPO
1 stop37h 40m
Turkish Airlines
Thu 10/16:10 am
OPO
- ORD
1 stop33h 30m
Turkish Airlines
Deal found 4/24![Turkish Airlines logo]()
$728
This FlightHub deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:10 pm
ORD
- OPO
1 stop31h 35m
Turkish Airlines
Fri 10/910:40 am
OPO
- ORD
1 stop29h 00m
Turkish Airlines
Deal found 4/28![Turkish Airlines logo]()
$729
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 9/711:25 am
ORD
- OPO
1 stop22h 25m
Turkish Airlines
Tue 9/154:50 pm
OPO
- ORD
1 stop22h 50m
Turkish Airlines
Deal found 4/27![Turkish Airlines logo]()
$734
This oojo deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:10 pm
ORD
- OPO
1 stop37h 40m
Turkish Airlines
Mon 9/1410:40 am
OPO
- ORD
1 stop29h 00m
Turkish Airlines
Deal found 4/28![Turkish Airlines logo]()
$742
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 9/311:25 am
ORD
- OPO
1 stop22h 20m
Turkish Airlines
Fri 9/1110:40 am
OPO
- ORD
1 stop29h 00m
Turkish Airlines
Deal found 4/27![Turkish Airlines logo]()
$745
This oojo deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/268:10 pm
ORD
- OPO
1 stop21h 20m
Turkish Airlines
Wed 10/74:40 pm
OPO
- ORD
1 stop23h 00m
Turkish Airlines
Deal found 4/28![Turkish Airlines logo]()
$746
This KAYAK deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/111:25 am
ORD
- OPO
1 stop22h 15m
Turkish Airlines
Tue 9/154:50 pm
OPO
- ORD
1 stop22h 50m
Turkish Airlines
Deal found 4/27![Turkish Airlines logo]()
$755
This oojo deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/312:50 pm
ORD
- OPO
1 stop20h 20m
Turkish Airlines
Sun 11/810:55 am
OPO
- ORD
1 stop29h 10m
Turkish Airlines
Deal found 4/28![Turkish Airlines logo]()
$762
This Justfly.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/311:25 am
ORD
- OPO
1 stop22h 20m
Turkish Airlines
Mon 9/144:50 pm
OPO
- ORD
1 stop22h 50m
Turkish Airlines
Deal found 4/27![Turkish Airlines logo]()
$763
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 April 29, 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 April 29, 2026.
This Delta deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:10 pm
ORD
- OPO
2 stops15h 20m
Delta
Thu 10/15:00 am
OPO
- ORD
1 stop15h 15m
Delta
Deal found 4/24![Delta logo]()
$900
This United Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:30 pm
ORD
- OPO
2 stops51h 30m
United Airlines
Mon 8/246:00 am
OPO
- ORD
1 stop35h 00m
United Airlines
Deal found 4/24![United Airlines logo]()
$931
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:00 am
ORD
- OPO
2 stops21h 30m
Delta
Tue 6/211:30 am
OPO
- ORD
1 stop33h 00m
Delta
Deal found 4/28![Delta logo]()
$972
This United Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/118:04 pm
ORD
- OPO
1 stop31h 41m
United Airlines
Sun 7/2612:15 pm
OPO
- ORD
1 stop32h 40m
United Airlines
Deal found 4/25![United Airlines logo]()
$1,148
This Delta deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/257:00 pm
ORD
- OPO
2 stops14h 30m
Delta
Mon 6/15:00 am
OPO
- ORD
2 stops17h 29m
Delta
Deal found 4/27![Delta logo]()
$1,057
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:10 pm
ORD
- OPO
2 stops18h 05m
Delta
Fri 9/45:00 am
OPO
- ORD
2 stops18h 41m
Delta
Deal found 4/26![Delta logo]()
$1,109
This Delta deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:10 pm
ORD
- OPO
2 stops15h 15m
Delta
Wed 9/165:00 am
OPO
- ORD
2 stops19h 07m
Delta
Deal found 4/25![Delta logo]()
$1,109
This Delta deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 8/285:45 pm
ORD
- OPO
2 stops18h 30m
Delta
Sun 9/65:00 am
OPO
- ORD
2 stops17h 45m
Delta
Deal found 4/27![Delta logo]()
$1,169
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/510:30 am
ORD
- OPO
2 stops16h 00m
Delta
Sat 9/125:00 am
OPO
- ORD
2 stops21h 24m
Delta
Deal found 4/26![Delta logo]()
$1,169
Last-minute flights from O'Hare Intl to PortoDiscover last-minute flight deals from O'Hare Intl to Porto. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from O'Hare Intl to Porto. Data last updated April 29, 2026 and is based on user searches.
This lol.travel deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/36:00 pm
ORD
- OPO
1 stop24h 40m
TAP AIR PORTUGAL
Tue 5/1910:30 pm
OPO
- ORD
1 stop23h 30m
TAP AIR PORTUGAL
Deal found 4/28![TAP AIR PORTUGAL logo]()
$880
This Gotogate deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/69:40 pm
ORD
- OPO
1 stop19h 45m
Lufthansa
Sun 5/106:20 am
OPO
- ORD
1 stop17h 55m
Lufthansa
Deal found 4/28![Lufthansa logo]()
$920
This Mytrip deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/1112:59 pm
ORD
- OPO
3 stops26h 46m
Multiple Airlines
Thu 5/145:20 pm
OPO
- ORD
2 stops28h 40m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$894
This Mytrip deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/137:05 pm
ORD
- OPO
3 stops30h 45m
Multiple Airlines
Mon 5/1810:00 pm
OPO
- ORD
2 stops27h 55m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$903
This Gotogate deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/139:40 pm
ORD
- OPO
1 stop19h 45m
Lufthansa
Mon 5/186:20 am
OPO
- ORD
1 stop17h 55m
Lufthansa
Deal found 4/27![Lufthansa logo]()
$933
This Mytrip deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/199:55 am
ORD
- OPO
3 stops32h 00m
Multiple Airlines
Tue 5/264:00 pm
OPO
- ORD
3 stops34h 08m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$914
This Mytrip deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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.
Tue 5/269:55 am
ORD
- OPO
2 stops31h 15m
Multiple Airlines
Mon 6/151:30 pm
OPO
- ORD
2 stops26h 48m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$915
This Mytrip deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/272:15 pm
ORD
- OPO
2 stops34h 30m
Multiple Airlines
Wed 6/38:25 am
OPO
- ORD
2 stops17h 51m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$919
This Mytrip deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/319:55 am
ORD
- OPO
2 stops30h 05m
Multiple Airlines
Thu 6/45:20 pm
OPO
- ORD
2 stops28h 40m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$900
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 April 29, 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 April 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:25 pm
ORD
- OPO
2 stops19h 15m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 9/277:25 pm
ORD
- OPO
2 stops19h 15m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$358
This Air Canada deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:25 am
ORD
- OPO
2 stops17h 35m
Air Canada
Deal found 4/28![Air Canada logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 9/267:25 pm
ORD
- OPO
2 stops18h 00m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$367
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/210:25 pm
ORD
- OPO
2 stops35h 35m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$369
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/173:45 pm
ORD
- OPO
1 stop24h 00m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$370
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:25 pm
ORD
- OPO
2 stops14h 35m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$371
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/249:00 pm
ORD
- OPO
2 stops17h 40m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$378
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 8/103:45 pm
ORD
- OPO
2 stops33h 00m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$380
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:25 pm
ORD
- OPO
3 stops39h 50m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$385
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/253:45 pm
ORD
- OPO
1 stop25h 25m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$386
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 April 29, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $704 (oojo) |
One-way from | $357 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $599 |
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 April 29, 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
Quickest round-trip
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Sun 9/20
6:10 pm-3:30 pm
2 stops15h 20m
Porto
Thu 10/1
5:00 am-2:15 pm
1 stop15h 15m
$900
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Sat 8/15
9:30 pm-7:00 am
2 stops51h 30m
Porto
Mon 8/24
6:00 am-11:00 am
1 stop35h 00m
$931
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Wed 5/27
7:00 am-10:30 am
2 stops21h 30m
Porto
Tue 6/2
11:30 am-2:30 pm
1 stop33h 00m
$972
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Mon 5/25
7:00 pm-3:30 pm
2 stops14h 30m
Porto
Mon 6/1
5:00 am-4:29 pm
2 stops17h 29m
$1,057
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Fri 8/28
6:10 pm-6:15 pm
2 stops18h 05m
Porto
Fri 9/4
5:00 am-5:41 pm
2 stops18h 41m
$1,109
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Thu 9/3
6:10 pm-3:25 pm
2 stops15h 15m
Porto
Wed 9/16
5:00 am-6:07 pm
2 stops19h 07m
$1,109
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Sat 7/11
8:04 pm-9:45 am
1 stop31h 41m
Porto
Sun 7/26
12:15 pm-2:55 pm
1 stop32h 40m
$1,148
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Fri 8/28
5:45 pm-6:15 pm
2 stops18h 30m
Porto
Sun 9/6
5:00 am-4:45 pm
2 stops17h 45m
$1,169
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Sat 9/5
10:30 am-8:30 am
2 stops16h 00m
Porto
Sat 9/12
5:00 am-8:24 pm
2 stops21h 24m
$1,169
Cheapest one-way
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Sat 7/25
9:40 pm-6:55 am
2 stops27h 15m
$433
Showing 1-10 of 19 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 April.
| 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 $558). Flying from Chicago O'Hare Intl Airport to Porto in June is currently the most expensive (average of $937). 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 April 29, 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.
Boarding
7.8
Food
7.3
Entertainment
7.1
Overall
7.8
Crew
8.4
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Food
7.3
Entertainment
7.1
Overall
7.8
Crew
8.4
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Food
7.3
Entertainment
7.1
Overall
7.8
Crew
8.4
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Food
7.3
Entertainment
7.1
Overall
7.8
Crew
8.4
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Food
7.3
Entertainment
7.1
Overall
7.8
Crew
8.4
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Food
7.3
Entertainment
7.1
Overall
7.8
Crew
8.4
Comfort
7.7
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 April 29, 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 April 29, 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 April 29, 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 April 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$450 | Average$736 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$474 | Average$594 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$519 | Average$727 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$524 | Average$809 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$531 | Average$698 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$541 | Average$741 | FlexibilityNo cancel fee | On-time69% |