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$319+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — ORD
ene. 26 — feb. 21
dom. 1/26
dom. 2/2
1 adult, Economy
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Cheap flight deals from Portugal to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Portugal (PT0) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated enero 21, 2025.

Round-trip from

$401
(Mytrip)

One-way from

$319
(Kiwi.com)

Good one-way deal

$616 or less
From Portugal to Illinois
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One-way flight from Portugal to Illinois
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Price to beat on a one-way flight from Portugal to Illinois.
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Cheapest flights from Portugal to Illinois
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 enero 21, 2025.

This Mytrip deal was found by Cheapflights users on 1/21. 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.
mar. 3/119:05 amLIS - ORD
2 stops35h 25mMultiple Airlines
lun. 3/245:25 pmORD - LIS
2 stops23h 00mMultiple Airlines
Deal found 1/21$401
This Mytrip deal was found by Cheapflights users on 1/21. 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.
lun. 3/109:55 pmOPO - ORD
2 stops24h 20mMultiple Airlines
lun. 3/173:35 pmORD - OPO
2 stops17h 20mMultiple Airlines
Deal found 1/21$449
This Aer Lingus deal was found by Cheapflights users on 1/20. 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 Aer Lingus is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/310:50 amLIS - ORD
1 stop13h 05mAer Lingus
lun. 3/104:55 pmORD - LIS
1 stop12h 15mAer Lingus
Deal found 1/20$526
This Gotogate deal was found by Cheapflights users on 1/21. 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.
jue. 2/66:00 pmOPO - ORD
1 stop27h 30mTAP AIR PORTUGAL
mié. 2/197:15 pmORD - OPO
1 stop30h 30mTAP AIR PORTUGAL
Deal found 1/21$580
This Gotogate deal was found by Cheapflights users on 1/20. 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.
vie. 1/2412:00 pmLIS - ORD
Nonstop9h 30mTAP AIR PORTUGAL
vie. 2/78:20 pmORD - LIS
Nonstop7h 50mTAP AIR PORTUGAL
Deal found 1/20$588
This Delta deal was found by Cheapflights users on 1/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 2/195:00 amLIS - ORD
1 stop15h 30mDelta
mié. 2/261:40 pmORD - LIS
2 stops19h 30mDelta
Deal found 1/20$593
This Delta deal was found by Cheapflights users on 1/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/55:00 amLIS - MDW
2 stops19h 11mDelta
dom. 3/96:42 pmMDW - LIS
2 stops17h 48mDelta
Deal found 1/20$598
This KLM deal was found by Cheapflights users on 1/20. 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.
vie. 2/75:00 amLIS - ORD
1 stop15h 30mKLM
dom. 2/164:25 pmORD - LIS
1 stop24h 45mKLM
Deal found 1/20$600
This Delta deal was found by Cheapflights users on 1/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/106:20 amOPO - ORD
1 stop14h 10mDelta
lun. 3/176:20 pmORD - OPO
1 stop11h 30mDelta
Deal found 1/20$606
This Booking.com deal was found by Cheapflights users on 1/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/37:20 amLIS - ORD
1 stop13h 30mBritish Airways
dom. 5/1110:20 pmORD - LIS
1 stop13h 35mBritish Airways
Deal found 1/20$610
This KLM deal was found by Cheapflights users on 1/21. 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.
lun. 11/245:00 amOPO - ORD
1 stop15h 30mKLM
lun. 12/15:20 pmORD - OPO
1 stop11h 30mKLM
Deal found 1/21$612
This American Airlines deal was found by Cheapflights users on 1/21. 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.
jue. 5/86:35 amLIS - ORD
1 stop18h 10mAmerican Airlines
mar. 5/207:10 pmORD - LIS
1 stop14h 20mAmerican Airlines
Deal found 1/21$616

Find flights from Portugal to Illinois within your budget

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 enero 21, 2025.

Fly from

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Fly to

Any airport

Route

Depart

Return

Price

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

mar. 3/11

9:05 am-3:30 pm

2 stops35h 25m

Chicago O'Hare Intl

lun. 3/24

5:25 pm-9:25 pm

2 stops23h 00m

$401

PortoChicago

OPO - ORD

OPOORD

Porto

lun. 3/10

9:55 pm-5:15 pm

2 stops24h 20m

Chicago O'Hare Intl

lun. 3/17

3:35 pm-1:55 pm

2 stops17h 20m

$449

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

lun. 3/3

10:50 am-5:55 pm

1 stop13h 05m

Chicago O'Hare Intl

lun. 3/10

4:55 pm-10:10 am

1 stop12h 15m

$526

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 2/6

6:00 pm-3:30 pm

1 stop27h 30m

Chicago O'Hare Intl

mié. 2/19

7:15 pm-7:45 am

1 stop30h 30m

$580

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

vie. 2/7

12:00 pm-3:30 pm

Nonstop9h 30m

Chicago O'Hare Intl

dom. 2/16

8:25 pm-10:15 am

Nonstop7h 50m

$591

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

mié. 2/19

5:00 am-2:30 pm

1 stop15h 30m

Chicago O'Hare Intl

mié. 2/26

1:40 pm-3:10 pm

2 stops19h 30m

$593

LisbonChicago

LIS - MDW

LISMDW

Lisbon Humberto Delgado

mié. 3/5

5:00 am-6:11 pm

2 stops19h 11m

Chicago Midway

dom. 3/9

6:42 pm-5:30 pm

2 stops17h 48m

$598

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

vie. 2/7

5:00 am-2:30 pm

1 stop15h 30m

Chicago O'Hare Intl

dom. 2/16

4:25 pm-11:10 pm

1 stop24h 45m

$600

PortoChicago

OPO - ORD

OPOORD

Porto

lun. 3/10

6:20 am-3:30 pm

1 stop14h 10m

Chicago O'Hare Intl

lun. 3/17

6:20 pm-10:50 am

1 stop11h 30m

$606

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

sáb. 5/3

7:20 am-2:50 pm

1 stop13h 30m

Chicago O'Hare Intl

dom. 5/11

10:20 pm-5:55 pm

1 stop13h 35m

$610

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 60 results
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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.
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 Portugal to Illinois

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

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

Currently, August is the cheapest month in which you can book a flight from Portugal to Illinois (average of $245). Flying from Portugal to Illinois in March is currently the most expensive (average of $320). 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 PT to IL?

Find hourly flight availability from Portugal to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated enero 21, 2025.

When flying from Portugal to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Illinois by month

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

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

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

If weather is an important factor for your trip to Illinois, 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 23.0 F).

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 enero 21, 2025.
To help decide which airline to fly from Portugal to Illinois, see what other customers have to say about United Airlines, Delta and KLM. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair
7.6
Good
1,286 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines
7.6
Good
786 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS
7.5
Good
1,600 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

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

    One-way options have recently been found by users for as low as $449 on Aer Lingus. Other airlines that offer cheap prices include Air Serbia from $482 and Turkish Airlines from $550 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portugal to Illinois 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 Portugal to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Portugal to Illinois (average of $245). Flying from Portugal to Illinois in March is currently the most expensive (average of $320). 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 Portugal to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Portugal to Illinois

Discover the top 3 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 enero 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$474Average$659FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$580Average$1,076FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$716Average$882FlexibilityNo cancel feeOn-time69%
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