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>

$297 CHEAP FLIGHTS from Illinois to Porto

OPO

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

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Cheap Flights from Illinois to Porto

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

Sun, Apr 19 - Tue, May 5

6:00 pm - 11:00 pm

ORD

OPO

23h 00m

1 stop

9:15 pm - 4:00 pm

OPO

ORD

24h 45m

1 stop

$549TAP AIR PORTUGAL

Wed, Apr 15 - Wed, Apr 22

6:00 pm - 5:00 pm

ORD

OPO

17h 00m

1 stop

10:00 am - 4:00 pm

OPO

ORD

12h 00m

1 stop

$551TAP AIR PORTUGAL

Wed, Apr 15 - Tue, Apr 21

6:00 pm - 10:55 am

ORD

OPO

10h 55m

1 stop

10:30 pm - 4:00 pm

OPO

ORD

23h 30m

1 stop

$566TAP AIR PORTUGAL

Wed, Apr 8 - Wed, Apr 15

8:10 pm - 3:45 pm

ORD

OPO

37h 35m

1 stop

4:40 pm - 9:40 am

OPO

ORD

23h 00m

1 stop

$587Turkish Airlines

Sun, Apr 19 - Tue, Apr 28

11:25 am - 3:50 pm

ORD

OPO

22h 25m

1 stop

4:50 pm - 9:40 am

OPO

ORD

22h 50m

1 stop

$591Turkish Airlines

Mon, Apr 20 - Tue, Apr 28

1:24 pm - 3:25 pm

MDW

OPO

20h 01m

2 stops

5:00 am - 4:26 pm

OPO

MDW

17h 26m

2 stops

$808Delta

Sun, May 3 - Sun, May 10

6:11 pm - 4:00 pm

STL

OPO

15h 49m

2 stops

8:20 am - 7:33 pm

OPO

STL

17h 13m

2 stops

$812American Airlines

Wed, Apr 22 - Thu, Apr 30

6:38 pm - 10:15 pm

MDW

OPO

21h 37m

2 stops

5:00 am - 5:58 pm

OPO

MDW

18h 58m

2 stops

$813Delta

Sun, May 3 - Sun, May 10

2:33 pm - 8:00 pm

STL

OPO

23h 27m

2 stops

8:20 am - 10:19 pm

OPO

STL

19h 59m

2 stops

$818Iberia

Sun, May 3 - Sun, May 10

6:11 pm - 4:00 pm

STL

OPO

15h 49m

2 stops

8:20 am - 10:19 pm

OPO

STL

19h 59m

2 stops

$820Iberia

Useful Info

Low season	January
High season	July
Cheapest flight	$297

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

Chaves

Pinhao

Esposende

Viseu

Arcos de Valdevez

Espinho

Ponte de Lima

Baiao

Santa Maria da Feira

Caminha

Mira

Penafiel

Amares

Curia

Everything you need to know for your flight to Porto

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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)

OPO

$297 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