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Portugal

$284+ Cheap flights from Illinois to Portugal

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 7/27. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LIS
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Illinois to Portugal

Keep the following information in mind while searching for Illinois to Portugal flight deals. Data was last updated June 12, 2025.

Round-trip from

$436
(FlightHub)

One-way from

$284
(Flightnetwork)

Popular in

June

Cheapest in

February

Average price

$925

Good round-trip deal

$607 or less

Good one-way deal

$348 or less
From Illinois to Portugal
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One-way flight from Illinois to Portugal
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Highest demand for flights based on searches. 17% potential increase in price ($152 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Illinois to Portugal.
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Price to beat on a one-way flight from Illinois to Portugal.
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Find flight deals from Illinois to Portugal

Cheapest flights from Illinois to Portugal
Explore the most affordable flight options available from Illinois to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Scandinavian Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:20 pmORD - FNC
2 stops36h 25mScandinavian Airlines
Sat 12/64:10 pmFNC - ORD
1 stop30h 35mScandinavian Airlines
Deal found 6/11$475
This oojo deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/146:00 pmORD - FAO
1 stop23h 50mTAP AIR PORTUGAL
Sat 9/206:05 amFAO - ORD
1 stop16h 25mTAP AIR PORTUGAL
Deal found 6/12$488
This Gurufare deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/207:15 pmORD - FAO
1 stop31h 35mScandinavian Airlines
Tue 10/285:55 pmFAO - ORD
2 stops28h 50mScandinavian Airlines
Deal found 6/11$510
This Trip.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/28:20 pmORD - FNC
1 stop22h 40mTAP AIR PORTUGAL
Tue 11/116:15 pmFNC - ORD
1 stop26h 45mTAP AIR PORTUGAL
Deal found 6/11$519
This oojo deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/76:00 pmORD - PDL
1 stop16h 00mTAP AIR PORTUGAL
Mon 9/156:30 amPDL - ORD
1 stop15h 10mTAP AIR PORTUGAL
Deal found 6/11$529
This Gotogate deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/266:43 pmSTL - LIS
2 stops23h 07mLufthansa
Tue 11/115:00 amLIS - STL
2 stops23h 47mLufthansa
Deal found 6/10$570
This British Airways deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/59:45 pmORD - FNC
1 stop31h 35mBritish Airways
Tue 11/113:05 pmFNC - ORD
1 stop33h 40mBritish Airways
Deal found 6/10$579
This Mytrip deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/46:10 pmORD - FAO
2 stops17h 05mMultiple Airlines
Wed 8/204:05 pmFAO - ORD
2 stops26h 30mMultiple Airlines
Deal found 6/12$592
This British Airways deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/56:29 pmSTL - LIS
2 stops17h 16mBritish Airways
Wed 11/1211:15 amLIS - STL
1 stop15h 01mBritish Airways
Deal found 6/11$597
This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2910:30 amSTL - LIS
2 stops21h 50mUnited Airlines
Tue 11/45:00 amLIS - STL
2 stops16h 26mUnited Airlines
Deal found 6/9$603
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/39:20 amSTL - OPO
2 stops16h 20mAmerican Airlines
Thu 11/138:20 amOPO - STL
2 stops17h 40mAmerican Airlines
Deal found 6/11$607
This Gotogate deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/264:15 pmSTL - LIS
1 stop12h 05mMultiple Airlines
Tue 11/113:55 pmLIS - STL
1 stop28h 00mMultiple Airlines
Deal found 6/10$613

Cheapflights Fare Finder

Customize your flight search to find flights from Illinois to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from Illinois to Portugal that are best for you.

Fly from

Illinois

Fly to

Portugal

Route

Depart

Return

Price

ChicagoPonta Delgada

ORD - PDL

ORDPDL

Chicago O'Hare Intl

Sun 9/7

6:00 pm-3:00 pm

1 stop16h 00m

Ponta Delgada Nordela

Mon 9/15

6:30 am-4:40 pm

1 stop15h 10m

$529

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Sun 10/26

6:43 pm-10:50 pm

2 stops23h 07m

Lisbon Humberto Delgado

Tue 11/11

5:00 am-10:47 pm

2 stops23h 47m

$570

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Mon 8/4

6:10 pm-5:15 pm

2 stops17h 05m

Faro

Wed 8/20

4:05 pm-12:35 pm

2 stops26h 30m

$592

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Wed 11/5

6:29 pm-5:45 pm

2 stops17h 16m

Lisbon Humberto Delgado

Wed 11/12

11:15 am-8:16 pm

1 stop15h 01m

$597

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Wed 10/29

10:30 am-1:20 pm

2 stops21h 50m

Lisbon Humberto Delgado

Tue 11/4

5:00 am-3:26 pm

2 stops16h 26m

$603

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Mon 11/3

9:20 am-7:40 am

2 stops16h 20m

Porto

Thu 11/13

8:20 am-8:00 pm

2 stops17h 40m

$607

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Sun 10/26

4:15 pm-9:20 am

1 stop12h 05m

Lisbon Humberto Delgado

Tue 11/11

3:55 pm-1:55 pm

1 stop28h 00m

$613

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Mon 11/3

6:43 pm-10:25 pm

2 stops21h 42m

Porto

Thu 11/13

4:15 pm-1:55 pm

1 stop27h 40m

$623

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 8/17

9:00 am-6:55 am

2 stops15h 55m

Porto

Sun 8/31

12:10 pm-11:57 am

2 stops29h 47m

$654

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 7/8

4:30 pm-7:35 am

1 stop33h 05m

Porto

Wed 7/23

4:35 pm-1:30 pm

2 stops26h 55m

$655

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Illinois with our price prediction graph.
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 Illinois to Portugal

What is the cheapest month to book a flight from Illinois to Portugal?

Currently, January is the cheapest month in which you can book a flight from Illinois to Portugal (average of $612). Flying from Illinois to Portugal in June is currently the most expensive (average of $1,136). 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.

What is the cheapest time of day to fly from IL to PT?

Find hourly flight availability from Illinois to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Portugal as you normally would.

Rainfall in Portugal by month

Plan your trip to Portugal by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

Temperature in Portugal by month

Plan your trip to Portugal by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portugal, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated June 12, 2025.
See what other customers who have flown with Delta, Porter Airlines and KLM from Illinois to Portugal have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Porter Airlines
8.0
Very good
288 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Transat
7.8
Good
396 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Illinois to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Illinois to Portugal one-way?

    For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as $284. Users have also found prices from $316 and $413 on Icelandair and American Airlines, respectively.

  • Can I find deals for flights from Illinois to Portugal that include hotel bookings?

    Yes. In addition to deals on Illinois to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Portugal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Portugal.

  • Can I find deals for business class flights from Illinois to Portugal?

    Yes. Cheapflights offers flight deals from Illinois to Portugal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Portugal?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Portugal (average of $612). Flying from Illinois to Portugal in June is currently the most expensive (average of $1,136). 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.

See more FAQs

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Alternative routes for Illinois to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Illinois to Portugal

Discover the top 10 airlines that operate flights from Illinois to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$415Average$830FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$444Average$561FlexibilityNo cancel feeOn-time76%
FinnairCheapest$463Average$739FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$468Average$751FlexibilityNo cancel feeOn-time71%
IberiaCheapest$472Average$786FlexibilityNo cancel feeOn-time77%
Scandinavian AirlinesCheapest$472Average$767FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$490Average$702FlexibilityNo cancel feeOn-time72%
DeltaCheapest$498Average$740FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$504Average$1,076FlexibilityNo cancel feeOn-time70%
SWISSCheapest$517Average$746FlexibilityNo cancel feeOn-time79%

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