How does KAYAK find such low prices on flights from Illinois to Porto?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Porto. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Porto?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Illinois is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Illinois to Porto?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to Illinois with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Porto?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$235 CHEAP FLIGHTS from Illinois to Porto

OPO

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Cheap Flights from Illinois to Porto

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Porto that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Illinois to Porto

Wed, Oct 15 - Wed, Oct 22

2:00 pm - 10:00 amORD-OPO

14h 00m2 stops

7:15 am - 9:51 amOPO-ORD

32h 36m2 stops

$471

Find Deal

Tue, Oct 21 - Wed, Oct 29

10:40 am - 3:00 pmORD-OPO

22h 20m2 stops

8:05 pm - 7:30 pmOPO-ORD

28h 25m3 stops

$474

Find Deal

Wed, Nov 5 - Wed, Nov 12

4:20 pm - 9:30 amORD-OPO

11h 10m1 stop

6:00 am - 1:10 pmOPO-ORD

13h 10m1 stop

$484United Airlines

Find Deal

Fri, Nov 7 - Tue, Nov 11

8:15 pm - 10:00 pmORD-OPO

19h 45m1 stop

8:00 pm - 3:00 pmOPO-ORD

25h 00m1 stop

$486TAP AIR PORTUGAL

Find Deal

Wed, Nov 5 - Wed, Nov 12

1:00 pm - 9:30 amORD-OPO

14h 30m2 stops

6:00 am - 1:10 pmOPO-ORD

13h 10m1 stop

$489United Airlines

Find Deal

Wed, Oct 29 - Sun, Nov 9

8:10 pm - 7:00 pmORD-OPO

17h 50m1 stop

5:00 am - 3:00 pmOPO-ORD

16h 00m1 stop

$493TAP AIR PORTUGAL

Find Deal

Mon, Jan 12 - Thu, Jan 22

8:05 am - 7:40 amORD-OPO

17h 35m2 stops

8:20 am - 2:30 pmOPO-ORD

12h 10m1 stop

$503Iberia

Find Deal

Sun, Jan 11 - Tue, Jan 20

4:20 pm - 11:40 amORD-OPO

13h 20m1 stop

6:00 am - 1:10 pmOPO-ORD

13h 10m1 stop

$506Lufthansa

Find Deal

Sun, Jan 11 - Wed, Jan 21

6:45 pm - 7:40 amORD-OPO

30h 55m2 stops

4:40 pm - 2:30 pmOPO-ORD

27h 50m1 stop

$512Iberia

Find Deal

Sat, Jan 10 - Tue, Jan 20

9:15 pm - 11:40 amORD-OPO

32h 25m2 stops

6:00 am - 1:10 pmOPO-ORD

13h 10m1 stop

$523Lufthansa

Find Deal

Useful Info

Low season	February
High season	July
Cheapest flight	$235

Best time to beat the crowds with an average 23% drop in price.

Most popular time to fly with an average 25% increase in price.

Flight from Chicago to Porto

How does KAYAK find such low prices on flights from Illinois to Porto?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Porto.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Porto?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to Porto?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Porto?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Lamego

Guimarães

Pinhao

Viseu

Esposende

Arcos de Valdevez

Ponte de Lima

Santa Maria da Feira

Baiao

Amares

Everything you need to know for your flight to Porto

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Porto

Porto (OPO)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.

OPO

$235 Find Cheap Flights from Illinois to Porto

KAYAK searches hundreds of travel sites at once for deals on flights to Porto

Cheap Flights from Illinois to Porto

Recent round-trip flight deals from Illinois to Porto

Recent one-way flight deals from Illinois to Porto

Recent last minute flight deals from Illinois to Porto

Good to know

FAQs for booking flights from Illinois to Porto

How does KAYAK find such low prices on flights from Illinois to Porto?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Porto.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Porto?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Illinois to Porto?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Porto?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Porto?

Everything you need to know for your flight to Porto

Information on the airport you'll fly into in Porto

Cabin class types available on flights to Illinois

Complete your trip to Porto with a hotel stay or car rental

Find direct flights for Porto

Flights to other popular destinations

Flights from domestic origins to Porto

Choose which airport to fly into in Porto

Find deals for your return flight