$335+ Cheap flights from Portugal to Illinois
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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — ORD
Mar 5 — Mar 121
1 adult, Economy
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Cheapest flights from Portugal to IllinoisExplore the most affordable flight options available from Portugal to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 3, 2026.
Explore the most affordable flight options available from Portugal to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 1/31. 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 3/183:25 pm
LIS
- ORD
1 stop27h 20m
Multiple Airlines
Wed 3/257:00 pm
ORD
- LIS
1 stop13h 20m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$472
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 3/57:25 pm
OPO
- ORD
1 stop23h 20m
SWISS
Tue 3/107:50 pm
ORD
- OPO
1 stop17h 40m
SWISS
Deal found 2/2![SWISS logo]()
$484
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Sat 5/211:25 am
LIS
- ORD
1 stop13h 50m
Aer Lingus
Sun 5/103:45 pm
ORD
- LIS
1 stop13h 00m
Aer Lingus
Deal found 2/3![Aer Lingus logo]()
$493
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1310:15 pm
LIS
- ORD
1 stop21h 45m
Aer Lingus
Sun 5/173:45 pm
ORD
- LIS
1 stop13h 00m
Aer Lingus
Deal found 2/1![Aer Lingus logo]()
$495
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Mon 4/206:35 am
LIS
- ORD
1 stop13h 40m
Multiple Airlines
Tue 4/216:31 am
ORD
- LIS
2 stops29h 54m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$549
This Rumbo deal was found by Cheapflights users on 2/1. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/95:35 pm
OPO
- ORD
2 stops48h 22m
Scandinavian Airlines
Mon 3/238:20 pm
ORD
- OPO
1 stop32h 15m
Scandinavian Airlines
Deal found 2/1![Scandinavian Airlines logo]()
$555
This oojo deal was found by Cheapflights users on 2/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/34:35 pm
FAO
- ORD
1 stop28h 25m
TAP AIR PORTUGAL
Wed 2/187:10 pm
ORD
- FAO
1 stop14h 35m
TAP AIR PORTUGAL
Deal found 2/2![TAP AIR PORTUGAL logo]()
$580
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Mon 4/206:35 am
LIS
- ORD
1 stop13h 40m
Multiple Airlines
Mon 4/207:25 pm
ORD
- LIS
2 stops21h 35m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$585
This Gotogate deal was found by Cheapflights users on 2/2. 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.
Thu 2/56:00 pm
OPO
- ORD
1 stop27h 25m
TAP AIR PORTUGAL
Wed 2/187:10 pm
ORD
- OPO
1 stop20h 50m
TAP AIR PORTUGAL
Deal found 2/2![TAP AIR PORTUGAL logo]()
$591
This oojo deal was found by Cheapflights users on 2/1. 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.
Sun 3/156:00 pm
LIS
- ORD
1 stop28h 45m
Scandinavian Airlines
Sun 3/228:20 pm
ORD
- LIS
2 stops16h 35m
Scandinavian Airlines
Deal found 2/1![Scandinavian Airlines logo]()
$606
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 5/56:35 am
LIS
- ORD
1 stop13h 40m
Multiple Airlines
Mon 5/119:00 pm
ORD
- LIS
2 stops20h 00m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$608
This Booking.com deal was found by Cheapflights users on 2/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/254:55 pm
LIS
- ORD
1 stop29h 50m
Multiple Airlines
Wed 3/118:20 pm
ORD
- LIS
1 stop31h 35m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$622
Best flights from Portugal to IllinoisDiscover carefully curated flight deals from Portugal to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 3, 2026.
Discover carefully curated flight deals from Portugal to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 3/57:25 pm
OPO
- ORD
1 stop23h 20m
SWISS
Tue 3/107:50 pm
ORD
- OPO
1 stop17h 40m
SWISS
Deal found 2/2![SWISS logo]()
$484
This Trip.com deal was found by Cheapflights users on 2/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/95:35 pm
OPO
- ORD
2 stops53h 56m
Scandinavian Airlines
Mon 3/238:20 pm
ORD
- OPO
1 stop32h 15m
Scandinavian Airlines
Deal found 2/1![Scandinavian Airlines logo]()
$579
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 3/56:35 pm
OPO
- ORD
1 stop12h 05m
Multiple Airlines
Tue 3/106:51 pm
ORD
- OPO
2 stops15h 09m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$657
This oojo deal was found by Cheapflights users on 2/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/144:35 pm
FAO
- ORD
1 stop28h 10m
TAP AIR PORTUGAL
Fri 2/278:15 pm
ORD
- FAO
1 stop21h 35m
TAP AIR PORTUGAL
Deal found 2/2![TAP AIR PORTUGAL logo]()
$722
This KLM deal was found by Cheapflights users on 2/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/247:45 pm
FAO
- ORD
1 stop24h 35m
KLM
Sat 3/74:25 pm
ORD
- FAO
1 stop19h 35m
KLM
Deal found 2/1![KLM logo]()
$827
This Delta deal was found by Cheapflights users on 2/2. 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.
Tue 2/105:00 am
LIS
- MDW
2 stops18h 55m
Delta
Wed 2/2510:49 am
MDW
- LIS
2 stops15h 51m
Delta
Deal found 2/2![Delta logo]()
$833
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/186:00 am
OPO
- STL
1 stop13h 55m
Lufthansa
Wed 3/255:41 pm
STL
- OPO
2 stops16h 44m
Lufthansa
Deal found 2/1![Lufthansa logo]()
$837
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Wed 3/186:00 am
OPO
- STL
2 stops17h 00m
United Airlines
Wed 3/2511:25 am
STL
- OPO
2 stops17h 05m
United Airlines
Deal found 2/1![United Airlines logo]()
$862
This American Airlines deal was found by Cheapflights users on 2/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:20 am
LIS
- STL
2 stops15h 40m
American Airlines
Sun 3/87:00 am
STL
- LIS
2 stops21h 05m
American Airlines
Deal found 2/1![American Airlines logo]()
$897
This Gotogate deal was found by Cheapflights users on 2/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/176:00 am
OPO
- STL
2 stops39h 29m
Air Canada
Sat 2/214:05 pm
STL
- OPO
2 stops37h 05m
Air Canada
Deal found 2/1![Air Canada logo]()
$956
This FlightHub deal was found by Cheapflights users on 2/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/184:55 pm
LIS
- ORD
1 stop29h 50m
Scandinavian Airlines
Thu 3/57:20 pm
ORD
- LIS
2 stops44h 40m
Scandinavian Airlines
Deal found 2/2![Scandinavian Airlines logo]()
$648
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Mon 5/46:35 am
LIS
- ORD
1 stop13h 40m
Multiple Airlines
Sun 5/109:00 pm
ORD
- LIS
1 stop19h 05m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$670
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Mon 4/206:35 am
LIS
- ORD
1 stop13h 40m
Multiple Airlines
Tue 4/216:31 am
ORD
- LIS
1 stop21h 44m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$674
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/137:20 pm
OPO
- ORD
1 stop27h 00m
SWISS
Sat 2/216:50 pm
ORD
- OPO
1 stop34h 20m
SWISS
Deal found 2/1![SWISS logo]()
$743
This oojo deal was found by Cheapflights users on 2/3. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/146:00 pm
OPO
- ORD
1 stop26h 45m
TAP AIR PORTUGAL
Wed 2/187:10 pm
ORD
- OPO
1 stop13h 55m
TAP AIR PORTUGAL
Deal found 2/3![TAP AIR PORTUGAL logo]()
$753
This oojo deal was found by Cheapflights users on 2/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/114:55 pm
LIS
- ORD
1 stop29h 50m
Scandinavian Airlines
Wed 2/257:20 pm
ORD
- LIS
2 stops16h 35m
Scandinavian Airlines
Deal found 2/2![Scandinavian Airlines logo]()
$687
This Mytrip deal was found by Cheapflights users on 2/1. 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 3/91:15 pm
OPO
- ORD
2 stops31h 55m
Multiple Airlines
Mon 3/235:25 pm
ORD
- OPO
2 stops18h 35m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$680
This KLM deal was found by Cheapflights users on 2/3. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/16:50 pm
FAO
- ORD
2 stops29h 03m
KLM
Wed 3/115:25 pm
ORD
- FAO
1 stop34h 00m
KLM
Deal found 2/3![KLM logo]()
$831
This United Airlines deal was found by Cheapflights users on 2/2. 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 3/45:00 am
LIS
- STL
1 stop14h 55m
United Airlines
Sun 3/810:00 am
STL
- LIS
2 stops17h 10m
United Airlines
Deal found 2/2![United Airlines logo]()
$864
This Delta deal was found by Cheapflights users on 2/1. 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 2/65:00 am
LIS
- MDW
2 stops18h 55m
Delta
Fri 2/201:26 pm
MDW
- LIS
2 stops15h 09m
Delta
Deal found 2/1![Delta logo]()
$870
This Scandinavian Airlines deal was found by Cheapflights users on 2/2. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/1412:00 pm
FAO
- ORD
2 stops34h 55m
Scandinavian Airlines
Fri 2/277:20 pm
ORD
- FAO
1 stop15h 00m
Scandinavian Airlines
Deal found 2/2![Scandinavian Airlines logo]()
$730
This SWISS deal was found by Cheapflights users on 2/2. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/247:00 pm
FAO
- ORD
1 stop27h 20m
SWISS
Tue 3/107:50 pm
ORD
- FAO
1 stop13h 00m
SWISS
Deal found 2/2![SWISS logo]()
$817
This oojo deal was found by Cheapflights users on 2/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/114:55 pm
LIS
- ORD
1 stop29h 50m
Multiple Airlines
Wed 2/257:20 pm
ORD
- LIS
1 stop20h 15m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$687
This KLM deal was found by Cheapflights users on 2/2. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/247:45 pm
FAO
- ORD
1 stop24h 35m
KLM
Tue 3/101:57 pm
ORD
- FAO
2 stops14h 33m
KLM
Deal found 2/2![KLM logo]()
$832
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/176:00 am
OPO
- STL
2 stops23h 59m
Lufthansa
Sat 2/2111:39 am
STL
- OPO
1 stop15h 51m
Lufthansa
Deal found 2/1![Lufthansa logo]()
$924
This oojo deal was found by Cheapflights users on 2/3. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/1012:50 pm
LIS
- ORD
1 stop33h 55m
Scandinavian Airlines
Wed 2/257:20 pm
ORD
- LIS
2 stops16h 35m
Scandinavian Airlines
Deal found 2/3![Scandinavian Airlines logo]()
$740
This SWISS deal was found by Cheapflights users on 2/2. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/252:40 pm
FAO
- ORD
1 stop28h 05m
SWISS
Tue 3/105:10 pm
ORD
- FAO
1 stop15h 40m
SWISS
Deal found 2/2![SWISS logo]()
$817
This Mytrip deal was found by Cheapflights users on 2/1. 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.
Sat 2/2810:00 pm
LIS
- ORD
2 stops22h 20m
Multiple Airlines
Mon 3/166:20 pm
ORD
- LIS
2 stops23h 20m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$689
This KLM deal was found by Cheapflights users on 2/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/167:15 pm
FAO
- ORD
2 stops28h 38m
KLM
Sun 3/14:25 pm
ORD
- FAO
1 stop20h 00m
KLM
Deal found 2/1![KLM logo]()
$837
This Delta deal was found by Cheapflights users on 2/3. 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.
Sun 5/35:00 am
LIS
- MDW
2 stops18h 58m
Delta
Sun 5/106:30 am
MDW
- LIS
2 stops19h 30m
Delta
Deal found 2/3![Delta logo]()
$947
Last-minute flights from Portugal to IllinoisDiscover last-minute flight deals from Portugal to Illinois. Data last updated February 3, 2026 and is based on user searches.
Discover last-minute flight deals from Portugal to Illinois. Data last updated February 3, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 2/2. 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.
Thu 2/56:00 pm
OPO
- ORD
1 stop27h 25m
TAP AIR PORTUGAL
Wed 2/187:10 pm
ORD
- OPO
1 stop20h 50m
TAP AIR PORTUGAL
Deal found 2/2![TAP AIR PORTUGAL logo]()
$591
This lastminute.com deal was found by Cheapflights users on 2/1. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/86:05 am
FAO
- ORD
1 stop14h 40m
TAP AIR PORTUGAL
Sun 2/158:25 pm
ORD
- FAO
1 stop13h 20m
TAP AIR PORTUGAL
Deal found 2/1![TAP AIR PORTUGAL logo]()
$580
This Mytrip deal was found by Cheapflights users on 2/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/116:15 am
LIS
- ORD
2 stops17h 05m
Multiple Airlines
Wed 2/256:30 pm
ORD
- LIS
2 stops18h 45m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$681
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1212:05 pm
OPO
- ORD
1 stop34h 15m
SWISS
Thu 2/194:10 pm
ORD
- OPO
1 stop13h 00m
SWISS
Deal found 2/1![SWISS logo]()
$680
This FlightHub deal was found by Cheapflights users on 2/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/184:55 pm
LIS
- ORD
1 stop29h 50m
Scandinavian Airlines
Thu 3/57:20 pm
ORD
- LIS
2 stops44h 40m
Scandinavian Airlines
Deal found 2/2![Scandinavian Airlines logo]()
$648
This Booking.com deal was found by Cheapflights users on 2/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/254:55 pm
LIS
- ORD
1 stop29h 50m
Multiple Airlines
Wed 3/118:20 pm
ORD
- LIS
1 stop31h 35m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$622
This Booking.com deal was found by Cheapflights users on 2/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/254:55 pm
LIS
- ORD
1 stop29h 50m
Scandinavian Airlines
Wed 3/118:20 pm
ORD
- LIS
2 stops44h 30m
Scandinavian Airlines
Deal found 2/2![Scandinavian Airlines logo]()
$634
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 3/57:25 pm
OPO
- ORD
1 stop23h 20m
SWISS
Tue 3/107:50 pm
ORD
- OPO
1 stop17h 40m
SWISS
Deal found 2/2![SWISS logo]()
$484
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 3/56:35 pm
OPO
- ORD
1 stop12h 05m
Multiple Airlines
Tue 3/106:51 pm
ORD
- OPO
2 stops15h 09m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$657
This Rumbo deal was found by Cheapflights users on 2/1. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/95:35 pm
OPO
- ORD
2 stops48h 22m
Scandinavian Airlines
Mon 3/238:20 pm
ORD
- OPO
1 stop32h 15m
Scandinavian Airlines
Deal found 2/1![Scandinavian Airlines logo]()
$555
This oojo deal was found by Cheapflights users on 2/1. 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.
Sun 3/156:00 pm
LIS
- ORD
1 stop28h 45m
Scandinavian Airlines
Sun 3/228:20 pm
ORD
- LIS
2 stops16h 35m
Scandinavian Airlines
Deal found 2/1![Scandinavian Airlines logo]()
$606
This Kiwi.com deal was found by Cheapflights users on 1/31. 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 3/183:25 pm
LIS
- ORD
1 stop27h 20m
Multiple Airlines
Wed 3/257:00 pm
ORD
- LIS
1 stop13h 20m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$472
One-way flights from Portugal to IllinoisSearch for one-way flight options from Portugal to Illinois. Find affordable one-way fares based on user searches. Data last updated February 3, 2026.
Search for one-way flight options from Portugal to Illinois. Find affordable one-way fares based on user searches. Data last updated February 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/229:10 pm
LIS
- MDW
3 stops40h 54m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/229:15 pm
LIS
- ORD
2 stops45h 45m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/299:10 pm
LIS
- MDW
3 stops42h 30m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/216:45 pm
FAO
- ORD
3 stops52h 44m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/219:05 pm
LIS
- ORD
3 stops50h 24m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/298:20 pm
LIS
- ORD
2 stops46h 40m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$374
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/308:40 pm
FAO
- ORD
3 stops51h 10m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Thu 3/199:40 pm
LIS
- ORD
3 stops41h 40m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$386
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Mon 3/2310:00 pm
LIS
- ORD
3 stops49h 29m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$388
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/295:55 am
LIS
- STL
3 stops34h 35m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$390
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/189:00 am
LIS
- ORD
3 stops38h 29m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$397
This Kiwi.com deal was found by Cheapflights users on 1/31. 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 3/179:05 pm
LIS
- ORD
2 stops32h 17m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$398
Find flight deals from Portugal to Illinois
Keep the following information in mind while searching for Portugal to Illinois flight deals. Data was last updated February 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $472 (Kiwi.com) |
One-way from | $335 (Kiwi.com) |
Popular in | January |
Cheapest in | February |
Average price | $596 |
Good one-way deal | $641 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Portugal to Illinois 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 February 3, 2026.
Use the filters below to find and compare flights from Portugal to Illinois that are best for you.
Fly from
Portugal
Fly to
Illinois
Route
Depart
Return
Price
PortoChicago
OPO - ORD
OPOORD
Porto
Thu 3/5
7:25 pm-12:45 pm
1 stop23h 20m
Chicago O'Hare Intl
Tue 3/10
7:50 pm-6:30 pm
1 stop17h 40m
$484
PortoChicago
OPO - ORD
OPOORD
Porto
Mon 3/9
5:35 pm-6:31 pm
2 stops53h 56m
Chicago O'Hare Intl
Mon 3/23
8:20 pm-9:35 am
1 stop32h 15m
$579
LisbonChicago
LIS - ORD
LISORD
Lisbon Humberto Delgado
Wed 2/18
4:55 pm-4:45 pm
1 stop29h 50m
Chicago O'Hare Intl
Thu 3/5
7:20 pm-10:00 pm
2 stops44h 40m
$648
PortoChicago
OPO - ORD
OPOORD
Porto
Thu 3/5
6:35 pm-12:40 am
1 stop12h 05m
Chicago O'Hare Intl
Tue 3/10
6:51 pm-3:00 pm
2 stops15h 09m
$657
LisbonChicago
LIS - ORD
LISORD
Lisbon Humberto Delgado
Mon 5/4
6:35 am-2:15 pm
1 stop13h 40m
Chicago O'Hare Intl
Sun 5/10
9:00 pm-10:05 pm
1 stop19h 05m
$670
LisbonChicago
LIS - ORD
LISORD
Lisbon Humberto Delgado
Mon 4/20
6:35 am-2:15 pm
1 stop13h 40m
Chicago O'Hare Intl
Tue 4/21
6:31 am-10:15 am
1 stop21h 44m
$674
PortoChicago
OPO - ORD
OPOORD
Porto
Mon 3/9
1:15 pm-4:10 pm
2 stops31h 55m
Chicago O'Hare Intl
Mon 3/23
5:25 pm-5:00 pm
2 stops18h 35m
$680
LisbonChicago
LIS - ORD
LISORD
Lisbon Humberto Delgado
Wed 2/11
4:55 pm-4:45 pm
1 stop29h 50m
Chicago O'Hare Intl
Wed 2/25
7:20 pm-5:55 pm
2 stops16h 35m
$687
LisbonChicago
LIS - ORD
LISORD
Lisbon Humberto Delgado
Wed 2/11
4:55 pm-4:45 pm
1 stop29h 50m
Chicago O'Hare Intl
Wed 2/25
7:20 pm-9:35 pm
1 stop20h 15m
$687
LisbonChicago
LIS - ORD
LISORD
Lisbon Humberto Delgado
Sat 2/28
10:00 pm-2:20 pm
2 stops22h 20m
Chicago O'Hare Intl
Mon 3/16
6:20 pm-10:40 pm
2 stops23h 20m
$689
Showing 1-10 of 60 results
Best time to book a flight from Portugal to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Portugal with our price prediction graph.
LIS-ORD
OPO-ORD
FAO-ORD
LIS-MDW
OPO-STL
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 Portugal to Illinois
PT0-USIL
LIS-ORD
OPO-ORD
FAO-ORD
LIS-MDW
What is the cheapest month to book a flight from Portugal to Illinois?
Currently, November is the cheapest month in which you can book a flight from Portugal to Illinois (average of $517). Flying from Portugal to Illinois in February is currently the most expensive (average of $900). 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.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated February 3, 2026.
Read through reviews of airlines operating flights from Portugal to Illinois, such as Delta, KLM, and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Overall
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from Portugal to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Portugal to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Portugal to Illinois
Discover the top 5 airlines that operate flights from Portugal to Illinois. 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 February 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$650 | Average$696 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$653 | Average$740 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$665 | Average$1,205 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$669 | Average$768 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$760 | Average$898 | FlexibilityNo cancel fee | On-time69% |