$386+ Cheap flights from Chicago (CHI) 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 7/19. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — OPO
Jun 3 — Jun 101
Round-trip
1 adult, Economy
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Find cheap flights from Chicago to Porto with Cheapflights
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Cheapest flights from Chicago to PortoExplore the most affordable flight options available from Chicago to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 4, 2026.
Explore the most affordable flight options available from Chicago to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 4, 2026.
This Gotogate deal was found by Cheapflights users on 4/30. 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 12/27:00 pm
ORD
- OPO
1 stop12h 30m
TAP AIR PORTUGAL
Wed 12/95:00 am
OPO
- ORD
1 stop16h 30m
TAP AIR PORTUGAL
Deal found 4/30![TAP AIR PORTUGAL logo]()
$700
This oojo deal was found by Cheapflights users on 4/30. 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
Fri 9/1110:40 am
OPO
- ORD
1 stop29h 00m
Turkish Airlines
Deal found 4/30![Turkish Airlines logo]()
$703
This oojo deal was found by Cheapflights users on 5/4. 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.
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 5/4![Turkish Airlines logo]()
$705
This SmartFares deal was found by Cheapflights users on 4/30. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/39:20 pm
ORD
- OPO
1 stop35h 50m
Turkish Airlines
Tue 11/104:10 pm
OPO
- ORD
1 stop23h 55m
Turkish Airlines
Deal found 4/30![Turkish Airlines logo]()
$714
This Gotogate deal was found by Cheapflights users on 5/2. 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.
Sun 10/259:10 pm
ORD
- OPO
1 stop14h 50m
TAP AIR PORTUGAL
Sun 11/88:30 am
OPO
- ORD
1 stop13h 00m
TAP AIR PORTUGAL
Deal found 5/2![TAP AIR PORTUGAL logo]()
$719
This Justfly.com deal was found by Cheapflights users on 4/30. 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.
Wed 11/47:00 pm
ORD
- OPO
1 stop14h 00m
TAP AIR PORTUGAL
Wed 11/118:30 am
OPO
- ORD
1 stop13h 00m
TAP AIR PORTUGAL
Deal found 4/30![TAP AIR PORTUGAL logo]()
$724
This Justfly.com deal was found by Cheapflights users on 4/30. 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 11/212:50 pm
ORD
- OPO
1 stop20h 20m
Turkish Airlines
Wed 11/1110:55 am
OPO
- ORD
1 stop29h 10m
Turkish Airlines
Deal found 4/30![Turkish Airlines logo]()
$729
This oojo deal was found by Cheapflights users on 4/30. 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 9/98:10 pm
ORD
- OPO
1 stop37h 35m
Turkish Airlines
Mon 9/144:50 pm
OPO
- ORD
1 stop22h 50m
Turkish Airlines
Deal found 4/30![Turkish Airlines logo]()
$742
This oojo deal was found by Cheapflights users on 4/30. 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
Fri 9/1110:40 am
OPO
- ORD
1 stop29h 00m
Turkish Airlines
Deal found 4/30![Turkish Airlines logo]()
$748
This oojo deal was found by Cheapflights users on 5/1. 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 9/1610:45 am
OPO
- ORD
1 stop28h 55m
Turkish Airlines
Deal found 5/1![Turkish Airlines logo]()
$749
This Delta deal was found by Cheapflights users on 4/30. 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 12/210:35 am
MDW
- OPO
2 stops16h 30m
Delta
Wed 12/95:00 am
OPO
- MDW
2 stops17h 25m
Delta
Deal found 4/30![Delta logo]()
$776
This Mytrip deal was found by Cheapflights users on 4/30. 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 5/3110:30 am
MDW
- OPO
3 stops31h 05m
Multiple Airlines
Sun 6/78:25 am
OPO
- MDW
2 stops31h 10m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$881
Best flights from Chicago to PortoDiscover carefully curated flight deals from Chicago to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 4, 2026.
Discover carefully curated flight deals from Chicago to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 4, 2026.
This United Airlines deal was found by Cheapflights users on 5/2. 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 7/82:08 pm
ORD
- OPO
1 stop10h 52m
United Airlines
Wed 7/156:00 am
OPO
- ORD
2 stops35h 20m
United Airlines
Deal found 5/2![United Airlines logo]()
$963
This Delta deal was found by Cheapflights users on 4/29. 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 7/145:18 pm
ORD
- OPO
2 stops16h 07m
Delta
Tue 7/285:00 am
OPO
- ORD
2 stops19h 29m
Delta
Deal found 4/29![Delta logo]()
$974
This KLM deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/105:10 pm
ORD
- OPO
1 stop16h 15m
KLM
Sat 5/164:20 pm
OPO
- ORD
1 stop27h 55m
KLM
Deal found 4/30![KLM logo]()
$1,116
This Turkish Airlines deal was found by Cheapflights users on 5/3. 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 5/2811:25 am
ORD
- OPO
1 stop16h 15m
Turkish Airlines
Mon 6/86:30 am
OPO
- ORD
1 stop33h 10m
Turkish Airlines
Deal found 5/3![Turkish Airlines logo]()
$1,266
This United Airlines deal was found by Cheapflights users on 5/1. 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 7/106:20 pm
ORD
- OPO
2 stops54h 30m
United Airlines
Thu 7/2311:50 am
OPO
- ORD
1 stop33h 05m
United Airlines
Deal found 5/1![United Airlines logo]()
$986
This Delta deal was found by Cheapflights users on 5/1. 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 7/155:10 pm
MDW
- OPO
2 stops16h 15m
Delta
Wed 7/225:00 am
OPO
- MDW
2 stops19h 25m
Delta
Deal found 5/1![Delta logo]()
$1,026
This KLM deal was found by Cheapflights users on 5/4. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/145:10 pm
ORD
- OPO
1 stop22h 50m
KLM
Mon 5/184:20 pm
OPO
- ORD
1 stop27h 55m
KLM
Deal found 5/4![KLM logo]()
$1,117
This Delta deal was found by Cheapflights users on 5/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/710:35 am
MDW
- OPO
2 stops17h 55m
Delta
Thu 9/105:00 am
OPO
- MDW
2 stops19h 31m
Delta
Deal found 5/3![Delta logo]()
$1,039
This KLM deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:36 pm
MDW
- OPO
2 stops17h 34m
KLM
Thu 5/215:00 am
OPO
- MDW
2 stops18h 56m
KLM
Deal found 4/30![KLM logo]()
$1,135
This Delta deal was found by Cheapflights users on 5/2. 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 10/2510:35 am
MDW
- OPO
2 stops16h 30m
Delta
Sun 11/85:00 am
OPO
- MDW
2 stops22h 45m
Delta
Deal found 5/2![Delta logo]()
$1,039
This Delta deal was found by Cheapflights users on 5/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2912:41 pm
MDW
- OPO
2 stops15h 49m
Delta
Sat 8/156:30 am
OPO
- MDW
2 stops22h 06m
Delta
Deal found 5/4![Delta logo]()
$1,051
This United Airlines deal was found by Cheapflights users on 5/1. 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 5/317:00 am
ORD
- OPO
2 stops17h 55m
United Airlines
Sat 6/612:05 pm
OPO
- ORD
1 stop30h 50m
United Airlines
Deal found 5/1![United Airlines logo]()
$1,302
This United Airlines deal was found by Cheapflights users on 5/4. 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.
Fri 6/268:35 am
ORD
- OPO
1 stop16h 25m
United Airlines
Sat 7/46:00 am
OPO
- ORD
1 stop14h 55m
United Airlines
Deal found 5/4![United Airlines logo]()
$1,346
This Delta deal was found by Cheapflights users on 5/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1411:26 am
ORD
- OPO
2 stops15h 04m
Delta
Mon 5/185:00 am
OPO
- ORD
2 stops17h 56m
Delta
Deal found 5/4![Delta logo]()
$1,190
This Delta deal was found by Cheapflights users on 5/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1010:35 am
MDW
- OPO
2 stops17h 45m
Delta
Sun 10/185:00 am
OPO
- MDW
2 stops19h 37m
Delta
Deal found 5/4![Delta logo]()
$1,194
This Delta deal was found by Cheapflights users on 4/30. 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 9/310:35 am
MDW
- OPO
2 stops17h 55m
Delta
Fri 9/115:00 am
OPO
- MDW
2 stops19h 05m
Delta
Deal found 4/30![Delta logo]()
$1,207
This Delta deal was found by Cheapflights users on 5/1. 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 6/312:53 pm
MDW
- OPO
2 stops15h 37m
Delta
Wed 6/105:00 am
OPO
- MDW
2 stops17h 16m
Delta
Deal found 5/1![Delta logo]()
$1,220
This Delta deal was found by Cheapflights users on 5/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/212:53 pm
MDW
- OPO
2 stops15h 37m
Delta
Tue 6/95:00 am
OPO
- MDW
2 stops17h 16m
Delta
Deal found 5/3![Delta logo]()
$1,220
This Delta deal was found by Cheapflights users on 5/1. 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 5/294:20 pm
ORD
- OPO
1 stop23h 55m
Delta
Mon 6/811:25 am
OPO
- ORD
1 stop32h 50m
Delta
Deal found 5/1![Delta logo]()
$1,280
This Delta deal was found by Cheapflights users on 5/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/11:22 pm
MDW
- OPO
2 stops20h 03m
Delta
Sun 6/75:00 am
OPO
- MDW
2 stops17h 16m
Delta
Deal found 5/4![Delta logo]()
$1,290
This Delta deal was found by Cheapflights users on 5/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/127:17 pm
ORD
- OPO
2 stops16h 53m
Delta
Fri 7/35:00 am
OPO
- ORD
2 stops18h 04m
Delta
Deal found 5/3![Delta logo]()
$1,295
Last-minute flights from Chicago to PortoDiscover last-minute flight deals from Chicago to Porto. Data last updated May 4, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Porto. Data last updated May 4, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 5/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1111:05 am
ORD
- OPO
2 stops21h 10m
Multiple Airlines
Tue 5/2610:00 pm
OPO
- ORD
2 stops42h 18m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$847
This Mytrip deal was found by Cheapflights users on 5/4. 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.
Tue 5/122:00 pm
ORD
- OPO
2 stops22h 35m
Multiple Airlines
Mon 5/1810:40 pm
OPO
- ORD
2 stops20h 15m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$911
This Mytrip deal was found by Cheapflights users on 4/30. 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.
Fri 5/293:50 pm
ORD
- OPO
1 stop13h 55m
Multiple Airlines
Fri 6/58:25 am
OPO
- ORD
2 stops17h 00m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$926
This Mytrip deal was found by Cheapflights users on 4/30. 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 5/313:50 pm
ORD
- OPO
2 stops24h 10m
Multiple Airlines
Sun 6/78:25 am
OPO
- ORD
2 stops34h 45m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$874
This Mytrip deal was found by Cheapflights users on 4/30. 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 5/3110:30 am
MDW
- OPO
3 stops31h 05m
Multiple Airlines
Sun 6/78:25 am
OPO
- MDW
2 stops31h 10m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$881
This Mytrip deal was found by Cheapflights users on 5/1. 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 6/12:00 pm
ORD
- OPO
2 stops27h 30m
Multiple Airlines
Mon 6/810:25 pm
OPO
- ORD
2 stops27h 00m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$903
This Mytrip deal was found by Cheapflights users on 5/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/27:25 am
ORD
- OPO
2 stops22h 15m
Multiple Airlines
Tue 6/910:25 pm
OPO
- ORD
3 stops29h 40m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$907
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/210:15 am
MDW
- OPO
2 stops19h 25m
Multiple Airlines
Tue 6/91:30 pm
OPO
- MDW
1 stop26h 05m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$994
This Mytrip deal was found by Cheapflights users on 5/1. 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 6/39:55 am
ORD
- OPO
2 stops29h 25m
Multiple Airlines
Wed 6/108:25 am
OPO
- ORD
2 stops34h 45m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$855
This Mytrip deal was found by Cheapflights users on 4/30. 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 6/102:00 pm
ORD
- OPO
2 stops34h 45m
Multiple Airlines
Tue 6/168:25 am
OPO
- ORD
2 stops17h 51m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$916
This Trip.com deal was found by Cheapflights users on 4/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/149:55 am
ORD
- OPO
1 stop19h 50m
Multiple Airlines
Sun 6/218:25 am
OPO
- ORD
2 stops17h 51m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$912
This Mytrip deal was found by Cheapflights users on 5/4. 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.
Sun 6/143:20 pm
MDW
- OPO
2 stops33h 25m
Multiple Airlines
Sun 6/218:25 am
OPO
- MDW
2 stops31h 15m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$917
One-way flights from Chicago to PortoSearch for one-way flight options from Chicago to Porto. Find affordable one-way fares based on user searches. Data last updated May 4, 2026.
Search for one-way flight options from Chicago to Porto. Find affordable one-way fares based on user searches. Data last updated May 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 7/197:25 pm
ORD
- OPO
3 stops36h 10m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$386
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/2610:25 pm
ORD
- OPO
3 stops27h 05m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 7/294:55 pm
ORD
- OPO
1 stop11h 15m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$403
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 6/910:15 am
MDW
- OPO
3 stops45h 25m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$403
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 7/2810:25 pm
ORD
- OPO
3 stops17h 25m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$404
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 7/257:25 pm
ORD
- OPO
3 stops31h 25m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$410
This Delta deal was found by Cheapflights users on 5/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/229:30 am
MDW
- OPO
2 stops19h 00m
Delta
Deal found 5/3![Delta logo]()
$427
This Delta deal was found by Cheapflights users on 4/30. 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 9/266:45 pm
MDW
- OPO
2 stops38h 45m
Delta
Deal found 4/30![Delta logo]()
$443
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/510:25 am
MDW
- OPO
3 stops38h 55m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$466
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/33:20 pm
MDW
- OPO
3 stops48h 00m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$468
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 7/296:00 am
MDW
- OPO
3 stops42h 55m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$481
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 7/126:00 am
MDW
- OPO
3 stops43h 10m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$482
Find flight deals from Chicago to Porto
Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) 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 May 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $703 (oojo) |
One-way from | $386 (Kiwi.com) |
Popular in | July |
Cheapest in | April |
Average price | $729 |
Cheapflights Fare Finder
Customize your flight search to find flights from Chicago 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 May 4, 2026.
Use the filters below to find and compare flights from Chicago 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
Wed 7/8
2:08 pm-7:00 am
1 stop10h 52m
Porto
Wed 7/15
6:00 am-11:20 am
2 stops35h 20m
$963
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Tue 7/14
5:18 pm-3:25 pm
2 stops16h 07m
Porto
Tue 7/28
5:00 am-6:29 pm
2 stops19h 29m
$974
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Fri 7/10
6:20 pm-6:50 am
2 stops54h 30m
Porto
Thu 7/23
11:50 am-2:55 pm
1 stop33h 05m
$986
ChicagoPorto
MDW - OPO
MDWOPO
Chicago Midway
Wed 7/15
5:10 pm-3:25 pm
2 stops16h 15m
Porto
Wed 7/22
5:00 am-6:25 pm
2 stops19h 25m
$1,026
ChicagoPorto
MDW - OPO
MDWOPO
Chicago Midway
Mon 9/7
10:35 am-10:30 am
2 stops17h 55m
Porto
Thu 9/10
5:00 am-6:31 pm
2 stops19h 31m
$1,039
ChicagoPorto
MDW - OPO
MDWOPO
Chicago Midway
Sun 10/25
10:35 am-8:05 am
2 stops16h 30m
Porto
Sun 11/8
5:00 am-9:45 pm
2 stops22h 45m
$1,039
ChicagoPorto
MDW - OPO
MDWOPO
Chicago Midway
Wed 7/29
12:41 pm-10:30 am
2 stops15h 49m
Porto
Sat 8/15
6:30 am-10:36 pm
2 stops22h 06m
$1,051
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Sun 5/10
5:10 pm-3:25 pm
1 stop16h 15m
Porto
Sat 5/16
4:20 pm-2:15 pm
1 stop27h 55m
$1,116
ChicagoPorto
ORD - OPO
ORDOPO
Chicago O'Hare Intl
Thu 5/14
5:10 pm-10:00 pm
1 stop22h 50m
Porto
Mon 5/18
4:20 pm-2:15 pm
1 stop27h 55m
$1,117
ChicagoPorto
MDW - OPO
MDWOPO
Chicago Midway
Fri 5/15
6:36 pm-6:10 pm
2 stops17h 34m
Porto
Thu 5/21
5:00 am-5:56 pm
2 stops18h 56m
$1,135
Showing 1-10 of 37 resultsSorted by cheapest first
Compare providers for flights from Chicago 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 Chicago to Porto in May.
| 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-Porto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago-Porto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago-Porto flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago-Porto flights, Cheapflights users trust FlightHub the most. FlightHub 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-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 Chicago to Porto
Have a flexible travel schedule? Discover the best time to fly to Porto from Chicago with our price prediction graph.
CHI-OPO
MDW-OPO
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 to Porto
CHI-OPO
MDW-OPO
ORD-OPO
How far ahead should I book a flight from Chicago to Porto?
The price you pay for your flight from Chicago to Porto may vary depending on when you book. For the best chance of a lower fare, look to book 14 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Chicago to Porto?
Currently, September is the cheapest month in which you can book a flight from Chicago to Porto (average of $355). Flying from Chicago to Porto in June is currently the most expensive (average of $676). 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 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.
What day of the week experiences the fewest flight delays on this route?
Sunday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
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 May 4, 2026.
See what other customers who have flown with United Airlines,TAP AIR PORTUGAL, andIberia from Chicago to Porto have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Related info for your journey
Find useful and relevant information for your journey from Chicago 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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Chicago and Porto flights
Browse other Chicago and Porto flight options. Last updated on May 4, 2026.
Other flights from Chicago
Browse through other flights departing from Chicago. Flights are based on user searches made on Cheapflights and were last updated on May 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 May 4, 2026.
Top 6 airlines flying from Chicago to Porto
Discover the top 6 airlines that operate flights from Chicago 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 May 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$450 | Average$736 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$497 | Average$730 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$507 | Average$610 | 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% |