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Portugal

$317+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LIS
Apr 6 — Apr 131
Sun 4/6
Sun 4/13
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 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$551
(Gotogate)

One-way from

$317
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$708

Good round-trip deal

$665 or less

Good one-way deal

$336 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. 21% potential increase in price ($212 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($25 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 1, 2025.

This Gotogate deal was found by Cheapflights users on 3/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/136:00 pmORD - OPO
1 stop31h 50mTAP AIR PORTUGAL
Tue 4/294:00 pmOPO - ORD
1 stop30h 10mTAP AIR PORTUGAL
Deal found 3/31$551
This American Airlines deal was found by Cheapflights users on 3/31. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/152:55 pmORD - OPO
2 stops14h 45mAmerican Airlines
Fri 10/318:20 amOPO - ORD
2 stops17h 55mAmerican Airlines
Deal found 3/31$558
This United deal was found by Cheapflights users on 3/31. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/134:00 pmORD - OPO
1 stop17h 45mUnited Airlines
Tue 11/116:00 amOPO - ORD
2 stops23h 12mUnited Airlines
Deal found 3/31$562
This Expedia deal was found by Cheapflights users on 3/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/511:45 amORD - OPO
2 stops26h 05mBritish Airways
Mon 5/1212:20 pmOPO - ORD
1 stop31h 55mBritish Airways
Deal found 3/31$564
This American Airlines deal was found by Cheapflights users on 4/1. 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.
Sun 5/111:22 pmORD - OPO
2 stops16h 18mMultiple Airlines
Wed 5/218:35 pmOPO - ORD
1 stop23h 40mMultiple Airlines
Deal found 4/1$565
This United Airlines deal was found by Cheapflights users on 3/31. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:30 amORD - LIS
2 stops19h 50mUnited Airlines
Thu 12/1111:00 amLIS - ORD
2 stops33h 04mUnited Airlines
Deal found 3/31$569
This United deal was found by Cheapflights users on 3/31. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:35 pmORD - LIS
1 stop32h 40mMultiple Airlines
Thu 12/1111:00 amLIS - ORD
1 stop33h 45mMultiple Airlines
Deal found 3/31$571
This Expedia deal was found by Cheapflights users on 3/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/54:40 pmORD - LIS
2 stops16h 15mBritish Airways
Wed 11/127:05 amLIS - ORD
2 stops16h 32mBritish Airways
Deal found 3/31$572
This Air Canada deal was found by Cheapflights users on 3/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/297:15 amORD - LIS
2 stops20h 05mAir Canada
Tue 12/911:00 amLIS - ORD
2 stops27h 00mAir Canada
Deal found 3/30$578
This Lufthansa deal was found by Cheapflights users on 3/31. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/283:55 pmORD - OPO
1 stop17h 20mLufthansa
Thu 1/84:30 pmOPO - ORD
2 stops31h 51mLufthansa
Deal found 3/31$582
This Cheapflightsfares deal was found by Cheapflights users on 3/31. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/34:30 pmORD - OPO
1 stop13h 10mIberia
Tue 9/98:15 amOPO - ORD
1 stop12h 00mIberia
Deal found 3/31$586
This Delta deal was found by Cheapflights users on 3/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/162:10 pmORD - LIS
1 stop12h 50mDelta
Sat 11/2211:25 amLIS - ORD
1 stop33h 05mDelta
Deal found 3/31$587

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 1, 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

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 4/13

6:00 pm-7:50 am

1 stop31h 50m

Porto

Tue 4/29

4:00 pm-4:10 pm

1 stop30h 10m

$551

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 5/5

11:45 am-7:50 pm

2 stops26h 05m

Porto

Mon 5/12

12:20 pm-2:15 pm

1 stop31h 55m

$564

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 5/11

1:22 pm-11:40 am

2 stops16h 18m

Porto

Wed 5/21

8:35 pm-2:15 pm

1 stop23h 40m

$565

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Sun 5/11

9:15 pm-11:05 pm

1 stop19h 50m

Lisbon Humberto Delgado

Fri 5/23

7:20 am-6:15 pm

1 stop16h 55m

$588

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 5/6

4:30 pm-7:35 am

1 stop33h 05m

Porto

Wed 5/14

8:15 am-2:15 pm

1 stop12h 00m

$590

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 8/20

8:35 pm-3:40 pm

1 stop13h 05m

Lisbon Humberto Delgado

Sun 9/7

6:35 am-2:15 pm

1 stop13h 40m

$598

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Sun 8/17

5:45 pm-11:00 pm

1 stop23h 15m

Lisbon Humberto Delgado

Sun 8/24

6:35 am-2:15 pm

1 stop13h 40m

$599

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Fri 9/26

6:00 pm-7:55 am

Nonstop7h 55m

Lisbon Humberto Delgado

Wed 10/22

12:55 pm-4:10 pm

Nonstop9h 15m

$602

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Mon 9/8

11:25 am-9:55 am

1 stop16h 30m

Lisbon Humberto Delgado

Mon 9/15

10:55 am-10:00 pm

1 stop17h 05m

$614

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Fri 4/25

3:45 pm-10:45 am

1 stop13h 00m

Lisbon Humberto Delgado

Tue 4/29

10:15 pm-2:00 pm

1 stop21h 45m

$615

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

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 $1,203). 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 1, 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 1, 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
7,899 reviews

Food

7.3

Comfort

8.0

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
7.9
Good
278 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
1,321 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
381 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
1,267 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

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 $363. Users have also found prices from $386 and $457 on Icelandair and Scandinavian 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 $1,203). 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 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$420Average$860FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$445Average$585FlexibilityNo cancel feeOn-time76%
FinnairCheapest$463Average$746FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$468Average$770FlexibilityNo cancel feeOn-time71%
IberiaCheapest$472Average$789FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$490Average$702FlexibilityNo cancel feeOn-time72%
DeltaCheapest$498Average$761FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$515Average$1,186FlexibilityNo cancel feeOn-time70%
KLMCheapest$527Average$736FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$531Average$947FlexibilityNo cancel feeOn-time69%

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