Question 1

What is the cheapest flight from Porto to Chicago O'Hare Intl Airport?

Accepted Answer

In the last 3 days, the lowest price for a flight from Porto to Chicago O'Hare Intl Airport was $369 for a one-way ticket and $447 for a round-trip. <a href='/flight-routes/Porto-OPO/Chicago-O-Hare-Intl-ORD'>Visit our flight page for the latest deals!>/a>

Question 2

Do I need a passport to fly between Porto and Chicago?

Accepted Answer

Yes <a href='/flight-routes/Porto-OPO/Chicago-O-Hare-Intl-ORD'>Visit our flight page for the latest deals!>/a>

Question 3

Which aircraft models fly most regularly from Porto to Chicago?

Accepted Answer

We unfortunately don’t have that data for this specific route.

Question 4

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

Accepted Answer

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 Porto to Chicago. <a href='/flight-routes/Porto-OPO/Chicago-O-Hare-Intl-ORD'>Visit our flight page for the latest deals!>/a>

Question 5

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

Accepted Answer

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago from Porto is likely to change within 7 days, so travelers know whether to wait or book now. <a href='/flight-routes/Porto-OPO/Chicago-O-Hare-Intl-ORD'>Visit our flight page for the latest deals!>/a>

Question 6

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

Accepted Answer

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 Chicago with an airline and back to Porto with another airline. Booking your flights between Porto and ORD can sometimes prove cheaper using this method. <a href='/flight-routes/Porto-OPO/Chicago-O-Hare-Intl-ORD'>Visit our flight page for the latest deals!>/a>

Question 7

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

Accepted Answer

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 Chicago from Porto up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. <a href='/flight-routes/Porto-OPO/Chicago-O-Hare-Intl-ORD'>Visit our flight page for the latest deals!>/a>

Question 8

What is the cheapest layover airport when flying from Porto to Chicago?

Accepted Answer

Flights via Newark (EWR) offer the most affordable fares, with an average round-trip price of $835.

Question 9

What is the most popular layover airport when flying from Porto to Chicago?

Accepted Answer

Madrid (MAD) is the top choice – 45% of KAYAK users who clicked on 1-stop flights from Porto to Chicago picked an itinerary connecting there.

Question 10

Which layover airport has the quickest connection when flying from Porto to Chicago?

Accepted Answer

If you prefer a quick connection, Newark (EWR) often has the shortest layovers from Porto to Chicago, with an average of 2h 03m.

Question 11

Which layover airport offers the shortest total travel time from Porto to Chicago?

Accepted Answer

Consider flying via Lisbon (LIS) for the shortest journey. The average one-way travel time for flights connecting there is 12h 14m.

Question 12

Which airlines provide the cheapest flights from Porto to Chicago?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Porto to Chicago were found on Lufthansa ($447) and United Airlines ($459).

Question 13

Which airlines provide the cheapest flights from Porto to Chicago?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Porto to Chicago were found on Lufthansa ($447) and United Airlines ($459).

OPO - ORD

$369 Find Cheap Flights from Porto to Chicago

KAYAK searches hundreds of travel sites at once for deals on flights to Chicago O'Hare Intl Airport

Everything you should know

Cheap Flights from Porto to Chicago (OPO-ORD)

Recent round-trip flight deals from Porto to Chicago

Recent one-way flight deals from Porto to Chicago

Recent last minute flight deals from Porto to Chicago

KAYAK's insights & trends for Porto to Chicago flights

Get data-powered insights and trends into flights from Porto to Chicago to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Porto to Chicago?

In the past 3 days, the cheapest round-trip tickets from Porto to Chicago were found on Lufthansa ($447) and United Airlines ($459).

What is the most popular layover airport when flying from Porto to Chicago?

Madrid (MAD) is the top choice – 45% of KAYAK users who clicked on 1-stop flights from Porto to Chicago picked an itinerary connecting there.

What is the cheapest layover airport when flying from Porto to Chicago?

Flights via Newark (EWR) offer the most affordable fares, with an average round-trip price of $835.

Which layover airport offers the shortest total travel time from Porto to Chicago?

Consider flying via Lisbon (LIS) for the shortest journey. The average one-way travel time for flights connecting there is 12h 14m.

Which layover airport has the quickest connection when flying from Porto to Chicago?

If you prefer a quick connection, Newark (EWR) often has the shortest layovers from Porto to Chicago, with an average of 2h 03m.

Good to know

When to book flights from Porto to Chicago

FAQs for booking Porto to Chicago flights

What is the cheapest flight from Porto to Chicago O'Hare Intl Airport?

In the last 3 days, the lowest price for a flight from Porto to Chicago O'Hare Intl Airport was $369 for a one-way ticket and $447 for a round-trip.

Do I need a passport to fly between Porto and Chicago?

Yes

Which aircraft models fly most regularly from Porto to Chicago?

We unfortunately don’t have that data for this specific route.

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

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 Porto to Chicago.

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

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago from Porto 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 Porto to Chicago?

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 Chicago with an airline and back to Porto with another airline. Booking your flights between Porto and ORD can sometimes prove cheaper using this method.

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

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 Chicago from Porto up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Porto to Chicago

Information on your arrival and departure airports

Cabin class types available on flights to Chicago

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

Find direct flights to and from Porto and Chicago

Flights to other popular destinations

Flights from domestic origins to Chicago

Choose which airport to fly into in Chicago

Find deals for your return flight