HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$255+ Cheap flights from Illinois to Porto (OPO)

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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OPO
ene. 4 — ene. 111
sáb. 1/4
sáb. 1/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Porto with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Illinois to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to Porto (OPO). 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 diciembre 30, 2024.

Round-trip from

$496
(Mytrip)

One-way from

$255
(Kiwi.com)
From Illinois to Porto
Search Deals
One-way flight from Illinois to Porto
Search Deals

Find flight deals from Illinois to Porto

Cheapest flights from Illinois to Porto
Explore the most affordable flight options available from Illinois to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 30, 2024.

This Delta deal was found by Cheapflights users on 12/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/315:20 pmORD - OPO
1 stop11h 30mDelta
jue. 1/911:45 amOPO - ORD
2 stops26h 05mDelta
Deal found 12/29$946
This Kiwi.com deal was found by Cheapflights users on 12/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/298:25 pmORD - OPO
1 stop10h 35mMultiple Airlines
jue. 1/97:25 amOPO - ORD
2 stops38h 25mMultiple Airlines
Deal found 12/29$960
This British Airways deal was found by Cheapflights users on 12/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/319:45 pmORD - OPO
1 stop13h 55mBritish Airways
mié. 1/86:30 pmOPO - ORD
1 stop26h 15mBritish Airways
Deal found 12/29$1,127
This SWISS deal was found by Cheapflights users on 12/29. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/307:05 pmORD - OPO
1 stop17h 25mSWISS
jue. 1/97:30 pmOPO - ORD
1 stop26h 45mSWISS
Deal found 12/29$1,173
This United Airlines deal was found by Cheapflights users on 12/29. 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.
lun. 12/303:15 pmORD - OPO
1 stop14h 20mUnited Airlines
mié. 1/812:30 pmOPO - ORD
1 stop32h 45mUnited Airlines
Deal found 12/29$1,194
This TAP AIR PORTUGAL deal was found by Cheapflights users on 12/29. 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.
dom. 12/298:25 pmORD - OPO
1 stop10h 35mTAP AIR PORTUGAL
jue. 1/98:00 pmOPO - ORD
1 stop25h 30mTAP AIR PORTUGAL
Deal found 12/29$1,255
This Air Canada deal was found by Cheapflights users on 12/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/302:05 pmORD - OPO
2 stops15h 30mAir Canada
jue. 1/96:00 amOPO - ORD
2 stops19h 37mAir Canada
Deal found 12/29$1,430
This FlightHub deal was found by Cheapflights users on 12/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/319:10 pmORD - OPO
2 stops36h 30mBrussels Airlines
mar. 1/712:55 pmOPO - ORD
1 stop29h 20mBrussels Airlines
Deal found 12/29$1,685
This Air France deal was found by Cheapflights users on 12/29. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/301:50 pmORD - OPO
2 stops15h 00mKLM
mar. 1/711:15 amOPO - ORD
2 stops18h 44mKLM
Deal found 12/29$2,006
This Iberia deal was found by Cheapflights users on 12/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/304:45 pmORD - OPO
1 stop13h 00mIberia
dom. 1/59:55 pmOPO - ORD
2 stops22h 35mIberia
Deal found 12/29$2,778
This Delta deal was found by Cheapflights users on 12/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/3111:48 amMDW - OPO
2 stops16h 42mDelta
mar. 1/76:00 amOPO - MDW
2 stops17h 47mDelta
Deal found 12/29$8,472

Find flights from Illinois to Porto within your budget

Customize your flight search to find flights from Illinois to Porto 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 diciembre 30, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mié. 2/12

7:15 pm-10:00 pm

1 stop20h 45m

Porto

mié. 2/19

8:55 am-3:30 pm

1 stop12h 35m

$496

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mié. 2/12

11:35 am-11:15 am

2 stops17h 40m

Porto

mié. 2/19

6:00 am-9:01 am

2 stops33h 01m

$506

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mar. 2/4

3:35 pm-12:05 pm

2 stops38h 30m

Porto

mar. 2/11

12:05 pm-4:15 pm

1 stop34h 10m

$511

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

lun. 2/10

7:05 pm-6:40 pm

1 stop17h 35m

Porto

lun. 2/17

12:00 pm-4:15 pm

1 stop34h 15m

$515

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mié. 2/5

4:45 pm-4:00 pm

1 stop17h 15m

Porto

mié. 2/12

8:20 am-2:30 pm

1 stop12h 10m

$516

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mar. 2/18

4:45 pm-11:45 am

1 stop13h 00m

Porto

mié. 2/26

8:20 am-2:30 pm

1 stop12h 10m

$531

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mar. 2/11

8:12 am-7:40 am

2 stops17h 28m

Porto

mar. 2/18

8:20 am-2:30 pm

1 stop12h 10m

$538

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mié. 2/12

3:55 pm-3:15 pm

1 stop17h 20m

Porto

mié. 2/19

6:00 am-1:11 pm

2 stops37h 11m

$540

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

lun. 1/13

5:20 pm-10:50 am

1 stop11h 30m

Porto

mié. 1/29

6:00 am-2:30 pm

1 stop14h 30m

$542

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

mar. 2/18

1:26 pm-10:50 am

2 stops15h 24m

Porto

mar. 2/25

6:00 am-5:43 pm

2 stops17h 43m

$544

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/29

Showing 1-10 of 26 results
1
2
3

Best time to book a flight from Illinois to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto 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 Porto

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

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Porto (average of $523). Flying from Illinois to Porto in June is currently the most expensive (average of $1,081). 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 OPO?

Find hourly flight availability from Illinois to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 30, 2024.

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

Rainfall in Porto by month

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

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

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

If weather is an important factor for your trip to Porto, 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 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated diciembre 30, 2024.
Read through reviews of airlines operating flights from Illinois to Porto, such as Iberia, United Airlines and KLM. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,540 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 10

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

Delta
8.0
Very good
8,540 reviews
Delta
8.0
Very good
8,540 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 10

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

KLM
7.8
Good
1,339 reviews
Delta
8.0
Very good
8,540 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 10

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

SWISS
7.5
Good
1,595 reviews
Delta
8.0
Very good
8,540 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 10

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

Air France
7.4
Good
1,494 reviews
Delta
8.0
Very good
8,540 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 10

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

United Airlines
7.4
Good
8,984 reviews
Delta
8.0
Very good
8,540 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 10

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 Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto from Illinois?

    For a flight from Illinois to Porto, you will be flying into Porto. Porto (OPO) is just 6.8 mi from the center of the city.

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

    One-way options have recently been found by users for as low as $396 on British Airways. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $397 and KLM from $431 one-way.

  • What are the most popular routes from Illinois to Porto?

    When deciding which route to take from Illinois to Porto consider Chicago O'Hare Intl - Porto, Chicago Midway - Porto or Lambert-St Louis - Porto as they are the most popular.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Illinois to Porto (average of $523). Flying from Illinois to Porto in June is currently the most expensive (average of $1,081). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Porto

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Lisbon flights
John F Kennedy Intl to Lisbon flights
Boston to Lisbon flights
Dulles Intl to Lisbon flights
LaGuardia to Lisbon flights
Boston to Ponta Delgada flights
Miami to Lisbon flights
San Francisco to Lisbon flights
Reagan-National to Lisbon flights
Baltimore to Lisbon flights
Newark to Porto flights
O'Hare Intl to Lisbon flights
Los Angeles to Lisbon flights
Philadelphia to Lisbon flights
Dallas/Fort Worth to Lisbon flights
Seattle to Lisbon flights
John F Kennedy Intl to Porto flights
John F Kennedy Intl to Ponta Delgada flights
Newark to Ponta Delgada flights
Midway to Lisbon flights
Atlanta to Lisbon flights
LaGuardia to Porto flights
Denver to Lisbon flights
Love Field to Lisbon flights
LaGuardia to Ponta Delgada flights
Minneapolis to Lisbon flights
Boston to Porto flights
Charlotte to Lisbon flights
Hobby to Lisbon flights
Dulles Intl to Porto flights
Orlando to Lisbon flights
John F Kennedy Intl to Funchal flights
Sky Harbor Intl to Lisbon flights
Raleigh to Lisbon flights
Newark to Funchal flights
Portland to Lisbon flights
Baltimore to Porto flights
Detroit to Lisbon flights
George Bush Intcntl to Lisbon flights
Tampa to Lisbon flights
Reagan-National to Porto flights
Austin to Lisbon flights
LaGuardia to Funchal flights
O'Hare Intl to Porto flights
Boston to Funchal flights
Fort Lauderdale to Lisbon flights
Stewart to Lisbon flights
Charleston to Lisbon flights
Los Angeles to Porto flights
Newark to Faro flights

Top 9 airlines flying from Illinois to Porto

Discover the top 9 airlines that operate flights from Illinois to Porto. 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 diciembre 30, 2024.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$422Average$639FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$468Average$747FlexibilityNo cancel feeOn-time71%
IberiaCheapest$488Average$685FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$506Average$831FlexibilityNo cancel feeOn-time70%
DeltaCheapest$518Average$826FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$534Average$834FlexibilityNo cancel feeOn-time76%
KLMCheapest$549Average$838FlexibilityNo cancel feeOn-time75%
SWISSCheapest$616Average$940FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$635Average$1,037FlexibilityNo cancel feeOn-time69%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.