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$264+ 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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LIS
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$513
(Gotogate)

One-way from

$264
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$570

Good round-trip deal

$613 or less

Good one-way deal

$429 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. 24% potential increase in price ($252 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This Gotogate deal was found by Cheapflights users on 2/20. 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 4/111:30 amORD - OPO
2 stops17h 45mAir Canada
Tue 4/88:40 amOPO - ORD
2 stops16h 50mAir Canada
Deal found 2/20$513
This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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 3/312:20 pmORD - OPO
2 stops17h 25mSWISS
Mon 4/77:20 pmOPO - ORD
1 stop22h 50mSWISS
Deal found 2/19$514
This Gotogate deal was found by Cheapflights users on 2/20. 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 4/17:20 amORD - OPO
2 stops22h 05mMultiple Airlines
Tue 4/88:40 amOPO - ORD
2 stops16h 50mMultiple Airlines
Deal found 2/20$516
This United Airlines deal was found by Cheapflights users on 2/19. 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.
Tue 4/11:28 pmORD - OPO
2 stops14h 17mUnited Airlines
Tue 4/86:00 amOPO - ORD
1 stop12h 55mUnited Airlines
Deal found 2/19$517
This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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.
Tue 2/258:25 pmORD - LIS
1 stop15h 20mMultiple Airlines
Wed 3/56:30 amLIS - ORD
1 stop14h 00mMultiple Airlines
Deal found 2/19$518
This Austrian Airlines deal was found by Cheapflights users on 2/19. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/54:20 pmORD - OPO
1 stop13h 35mAustrian Airlines
Thu 3/2012:40 pmOPO - ORD
1 stop31h 25mAustrian Airlines
Deal found 2/19$518
This Gotogate deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/26:00 pmORD - OPO
1 stop11h 00mTAP AIR PORTUGAL
Wed 4/98:55 amOPO - ORD
1 stop13h 15mTAP AIR PORTUGAL
Deal found 2/19$519
This Lufthansa deal was found by Cheapflights users on 2/18. 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.
Wed 3/59:25 pmORD - LIS
1 stop20h 05mLufthansa
Tue 3/186:10 amLIS - ORD
1 stop18h 15mLufthansa
Deal found 2/18$520
This KLM deal was found by Cheapflights users on 2/18. 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 3/176:20 pmORD - OPO
1 stop11h 30mKLM
Wed 3/2611:25 amOPO - ORD
2 stops17h 31mKLM
Deal found 2/18$520
This United deal was found by Cheapflights users on 2/20. 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.
Tue 3/411:15 amORD - LIS
2 stops16h 05mUnited Airlines
Wed 3/1211:00 amLIS - ORD
2 stops30h 03mUnited Airlines
Deal found 2/20$524
This Air Canada deal was found by Cheapflights users on 2/19. 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.
Mon 3/38:30 pmORD - LIS
2 stops30h 50mAir Canada
Tue 3/1111:00 amLIS - ORD
1 stop13h 55mAir Canada
Deal found 2/19$526
This KLM deal was found by Cheapflights users on 2/20. 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 3/24:00 pmORD - LIS
1 stop10h 55mKLM
Tue 3/1811:25 amLIS - ORD
1 stop33h 05mKLM
Deal found 2/20$529

Find flights from Illinois to Portugal within your budget

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 February 20, 2025.

Fly from

Illinois

Fly to

Portugal

Route

Depart

Return

Price

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 4/1

11:30 am-11:15 am

2 stops17h 45m

Porto

Tue 4/8

8:40 am-7:30 pm

2 stops16h 50m

$513

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 3/31

2:20 pm-1:45 pm

2 stops17h 25m

Porto

Mon 4/7

7:20 pm-12:10 pm

1 stop22h 50m

$514

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 4/1

7:20 am-11:25 am

2 stops22h 05m

Porto

Tue 4/8

8:40 am-7:30 pm

2 stops16h 50m

$516

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 4/1

1:28 pm-9:45 am

2 stops14h 17m

Porto

Tue 4/8

6:00 am-12:55 pm

1 stop12h 55m

$517

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 3/5

4:20 pm-11:55 am

1 stop13h 35m

Porto

Thu 3/20

12:40 pm-3:05 pm

1 stop31h 25m

$518

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Tue 2/25

8:25 pm-5:45 pm

1 stop15h 20m

Lisbon Humberto Delgado

Tue 3/4

6:30 am-2:30 pm

1 stop14h 00m

$518

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 4/2

6:00 pm-11:00 am

1 stop11h 00m

Porto

Wed 4/9

8:55 am-4:10 pm

1 stop13h 15m

$519

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 3/5

9:25 pm-11:30 pm

1 stop20h 05m

Lisbon Humberto Delgado

Tue 3/18

6:10 am-7:25 pm

1 stop18h 15m

$520

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 3/17

6:20 pm-10:50 am

1 stop11h 30m

Porto

Wed 3/26

11:25 am-11:56 pm

2 stops17h 31m

$520

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Tue 3/4

11:15 am-9:20 am

2 stops16h 05m

Lisbon Humberto Delgado

Wed 3/12

11:00 am-12:03 pm

2 stops30h 03m

$524

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

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.

Travel insights for flights from Illinois to Portugal

Get recent, data-driven insights about flights from Illinois to Portugal including ideal travel times, pricing trends, and more.

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 $1,234). 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 February 20, 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 February 20, 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
8,220 reviews

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

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
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

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
7.9
Good
276 reviews
Delta
8.0
Very good
8,220 reviews

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

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
8,220 reviews

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

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
380 reviews
Delta
8.0
Very good
8,220 reviews

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

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
8,220 reviews

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

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 $340. Users have also found prices from $351 and $357 on Porter Airlines and Air Transat, 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 $1,234). 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.

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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$415Average$879FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$445Average$509FlexibilityNo cancel feeOn-time76%
FinnairCheapest$463Average$748FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$468Average$776FlexibilityNo cancel feeOn-time71%
IberiaCheapest$473Average$788FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$490Average$702FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$516Average$814FlexibilityNo cancel feeOn-time70%
DeltaCheapest$519Average$782FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$527Average$758FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$529Average$1,032FlexibilityNo cancel feeOn-time69%
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