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$320+ 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 7/19. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LIS
May 5 — May 121
Mon 5/5
Mon 5/12
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 April 30, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$567
(Cheapflightsfares)

One-way from

$324
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$719

Good round-trip deal

$712 or less

Good one-way deal

$326 or less
Provider with most accurate pricing for Chicago (CHI)-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Lisbon Humberto Delgado flights.
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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. 19% potential increase in price ($177 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 30, 2025.

This TAP AIR PORTUGAL 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:10 pmORD - FAO
1 stop17h 10mTAP AIR PORTUGAL
Sun 9/216:10 pmFAO - ORD
1 stop28h 30mTAP AIR PORTUGAL
Deal found 4/29$516
This Scandinavian Airlines 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/217:15 pmORD - FAO
2 stops41h 30mScandinavian Airlines
Sat 9/67:35 pmFAO - ORD
2 stops50h 35mScandinavian Airlines
Deal found 4/29$533
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:35 amMDW - OPO
2 stops17h 55mDelta
Fri 12/55:00 amOPO - MDW
2 stops19h 36mDelta
Deal found 4/28$570
This oojo deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/226:00 pmORD - FNC
1 stop18h 35mTAP AIR PORTUGAL
Wed 10/297:50 amFNC - ORD
1 stop13h 10mTAP AIR PORTUGAL
Deal found 4/28$573
This CrystalTravel 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/139:40 pmORD - OPO
1 stop19h 40mMultiple Airlines
Mon 10/207:20 pmOPO - ORD
1 stop22h 50mMultiple Airlines
Deal found 4/29$577
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2312:50 pmORD - OPO
2 stops14h 55mUnited Airlines
Tue 11/412:30 pmOPO - ORD
1 stop13h 35mUnited Airlines
Deal found 4/28$591
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1310:30 pmORD - OPO
2 stops18h 50mLufthansa
Tue 11/1112:30 pmOPO - ORD
1 stop13h 35mLufthansa
Deal found 4/29$593
This oojo deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/246:00 pmORD - OPO
1 stop20h 25mTAP AIR PORTUGAL
Fri 9/510:00 amOPO - ORD
1 stop12h 10mTAP AIR PORTUGAL
Deal found 4/28$596
This Gurufare 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/267:00 amORD - OPO
2 stops22h 00mScandinavian Airlines
Fri 9/55:55 pmOPO - ORD
1 stop28h 15mScandinavian Airlines
Deal found 4/29$598
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/242:49 pmSTL - LIS
1 stop12h 16mIberia
Tue 12/211:10 amLIS - STL
1 stop15h 06mIberia
Deal found 4/29$607
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/248:25 amSTL - LIS
1 stop19h 50mUnited Airlines
Tue 12/211:00 amLIS - STL
2 stops33h 18mUnited Airlines
Deal found 4/29$609
This oojo deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/87:50 pmORD - OPO
1 stop31h 55mTurkish Airlines
Mon 10/2010:55 amOPO - ORD
1 stop17h 05mTurkish Airlines
Deal found 4/28$610

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 April 30, 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

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Mon 9/15

6:10 pm-5:20 pm

1 stop17h 10m

Faro

Sun 9/21

6:10 pm-4:40 pm

1 stop28h 30m

$516

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Thu 8/21

7:15 pm-6:45 pm

2 stops41h 30m

Faro

Sat 9/6

7:35 pm-4:10 pm

2 stops50h 35m

$533

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 10/13

9:40 pm-11:20 pm

1 stop19h 40m

Porto

Mon 10/20

7:20 pm-12:10 pm

1 stop22h 50m

$577

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 10/23

12:50 pm-9:45 am

2 stops14h 55m

Porto

Tue 11/4

12:30 pm-8:05 pm

1 stop13h 35m

$591

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 10/13

10:30 pm-11:20 pm

2 stops18h 50m

Porto

Tue 11/11

12:30 pm-8:05 pm

1 stop13h 35m

$593

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 8/24

6:00 pm-8:25 pm

1 stop20h 25m

Porto

Fri 9/5

10:00 am-4:10 pm

1 stop12h 10m

$596

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 8/26

7:00 am-11:00 am

2 stops22h 00m

Porto

Fri 9/5

5:55 pm-4:10 pm

1 stop28h 15m

$598

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 10/8

7:50 pm-9:45 am

1 stop31h 55m

Porto

Mon 10/20

10:55 am-10:00 pm

1 stop17h 05m

$610

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Wed 10/22

5:59 pm-3:30 pm

2 stops15h 31m

Porto

Tue 11/4

5:00 am-6:36 pm

2 stops19h 36m

$612

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 10/20

1:35 pm-3:30 pm

2 stops19h 55m

Porto

Tue 11/4

11:45 am-7:38 am

2 stops25h 53m

$618

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/27

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 $1,178). 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 April 30, 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 April 30, 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
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Porter Airlines
8.0
Very good
285 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Transat
7.8
Good
385 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,273 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 $355. Users have also found prices from $390 and $393 on Scandinavian Airlines and Icelandair, 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 $1,178). 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$419Average$852FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$445Average$585FlexibilityNo cancel feeOn-time76%
FinnairCheapest$463Average$746FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$468Average$752FlexibilityNo cancel feeOn-time71%
IberiaCheapest$472Average$793FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$490Average$733FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$504Average$1,077FlexibilityNo cancel feeOn-time70%
DeltaCheapest$514Average$775FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$527Average$726FlexibilityNo cancel feeOn-time75%
Scandinavian AirlinesCheapest$529Average$784FlexibilityNo cancel feeOn-time77%

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