Which layover airport has the shortest connection time from Chicago to Porto?

Newark (EWR) has the shortest average layover time for this route: 1h 08m.

Which layover airport offers the lowest fares from Chicago to Porto?

Flights via Madrid (MAD) offer the lowest average round-trip price of $689.

Which airport is the most popular layover for flights between Chicago and Porto?

Lisbon (LIS) was the most common stop: 46% of momondo users choosing 1-stop flights on this route connected there.

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

Flights connecting via Newark (EWR) have the shortest average one-way travel time: 10h 29m.

What airlines fly to Porto?

TAP AIR PORTUGAL, United Airlines and Lufthansa are the top three most popular airlines that fly to Porto from Chicago according to our data. TAP AIR PORTUGAL is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 6 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

How often are flights from Chicago to Porto delayed?

Historically, on average around 100% of flights between Chicago and Porto have experienced a delay on any given week. The average delay length over the past 12 months has been 319 minutes.

What is the most punctual flight time for Chicago to Porto flights?

Generally, flights departing at night tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

What is the cheapest airline that flies from Chicago to Porto?

Air Canada is the most popular carrier operating from Chicago to Porto

What day of the week experiences the fewest flight delays on this route?

Sunday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

When did momondo last update prices for flights from Chicago to Porto Airport?

Prices for flights from Chicago to Porto Airport refresh daily.

How many operators does momondo search for flights from Chicago to Porto Airport?

As of May 2026, there are 6 operators available to choose from for flights from Chicago to Porto Airport.

How old do you have to be to fly from Chicago to Porto Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Porto Airport.

What documentation or ID do you need to fly to Porto Airport?

The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$359 Cheap Flights from Chicago to Porto in 2026

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Find the cheapest flights from Chicago to Porto

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One-way

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8:15 pm - 11:05 am

ORD

OPO

33h 50m

1 stop

5:45 pm - 4:45 pm

OPO

ORD

29h 00m

1 stop

$650Scandinavian Airlines

Sat, Oct 31 - Fri, Nov 6

7:15 pm - 11:00 am

ORD

OPO

33h 45m

1 stop

11:55 am - 4:45 pm

OPO

ORD

34h 50m

1 stop

$682Scandinavian Airlines

Tue, Oct 20 - Mon, Nov 9

11:25 am - 3:40 pm

ORD

OPO

22h 15m

1 stop

10:40 am - 9:40 am

OPO

ORD

29h 00m

1 stop

$705Turkish Airlines

Tue, Sep 1 - Fri, Sep 11

11:25 am - 9:40 am

ORD

OPO

16h 15m

1 stop

4:40 pm - 9:40 am

OPO

ORD

23h 00m

1 stop

$711Turkish Airlines

Thu, Sep 10 - Thu, Oct 1

10:30 am - 11:05 am

ORD

OPO

18h 35m

2 stops

5:35 pm - 4:45 pm

OPO

ORD

29h 10m

1 stop

$725Scandinavian Airlines

Tue, Nov 3 - Sun, Nov 8

11:25 am - 3:40 pm

ORD

OPO

22h 15m

1 stop

11:00 am - 9:40 am

OPO

ORD

28h 40m

1 stop

$727Turkish Airlines

Tue, Oct 6 - Thu, Oct 22

7:05 pm - 6:30 pm

ORD

OPO

17h 25m

1 stop

7:20 pm - 4:20 pm

OPO

ORD

27h 00m

1 stop

$748SWISS

Wed, Oct 21 - Mon, Nov 9

9:55 am - 10:30 am

MDW

OPO

18h 35m

2 stops

5:00 am - 9:45 pm

OPO

MDW

22h 45m

2 stops

$826Delta

Tue, Oct 20 - Mon, Nov 9

1:00 pm - 9:05 am

MDW

OPO

14h 05m

2 stops

5:00 am - 9:45 pm

OPO

MDW

22h 45m

2 stops

$843Delta

Sun, Nov 1 - Fri, Nov 6

10:15 am - 6:45 am

MDW

OPO

14h 30m

2 stops

8:25 am - 9:35 am

OPO

MDW

31h 10m

2 stops

$966Multiple Airlines

Tue, Jun 2 - Wed, Jun 10

Turkish Airlines flights from Chicago to Porto

Our best Turkish Airlines deals on Chicago to Porto flight tickets

Turkish Airlines

Sep 1

ORD11:25 amChicago O'Hare Intl

22h 15m

1 stop

OPO3:40 pmPorto

Sep 11

OPO10:40 amPorto

29h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

$705

Turkish Airlines

Sep 10

ORD11:25 amChicago O'Hare Intl

16h 15m

1 stop

OPO9:40 amPorto

Oct 1

OPO4:40 pmPorto

23h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

$711

Turkish Airlines

Oct 6

ORD11:25 amChicago O'Hare Intl

22h 15m

1 stop

OPO3:40 pmPorto

Oct 22

OPO11:00 amPorto

28h 40m

1 stop

ORD9:40 amChicago O'Hare Intl

$727

TAP AIR PORTUGAL flights from Chicago to Porto

Our best TAP AIR PORTUGAL deals on Chicago to Porto flight tickets

TAP AIR PORTUGAL

Aug 20

ORD7:50 pmChicago O'Hare Intl

13h 10m

1 stop

OPO3:00 pmPorto

Aug 26

OPO7:00 amPorto

13h 45m

1 stop

ORD2:45 pmChicago O'Hare Intl

$761

TAP AIR PORTUGAL

Aug 21

ORD6:00 pmChicago O'Hare Intl

19h 00m

1 stop

OPO7:00 pmPorto

Aug 26

OPO7:00 amPorto

13h 45m

1 stop

ORD2:45 pmChicago O'Hare Intl

$769

TAP AIR PORTUGAL

Aug 30

ORD6:00 pmChicago O'Hare Intl

20h 35m

1 stop

OPO8:35 pmPorto

Dec 9

OPO8:30 amPorto

13h 00m

1 stop

ORD3:30 pmChicago O'Hare Intl

$788

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 10/31

8:15 pm-11:05 am

1 stop33h 50m

Porto

Fri 11/6

5:45 pm-4:45 pm

1 stop29h 00m

$650

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 10/20

7:15 pm-11:00 am

1 stop33h 45m

Porto

Mon 11/9

11:55 am-4:45 pm

1 stop34h 50m

$682

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 9/1

11:25 am-3:40 pm

1 stop22h 15m

Porto

Fri 9/11

10:40 am-9:40 am

1 stop29h 00m

$705

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 9/10

11:25 am-9:40 am

1 stop16h 15m

Porto

Thu 10/1

4:40 pm-9:40 am

1 stop23h 00m

$711

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 11/3

10:30 am-11:05 am

2 stops18h 35m

Porto

Sun 11/8

5:35 pm-4:45 pm

1 stop29h 10m

$725

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 10/6

11:25 am-3:40 pm

1 stop22h 15m

Porto

Thu 10/22

11:00 am-9:40 am

1 stop28h 40m

$727

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 10/21

7:05 pm-6:30 pm

1 stop17h 25m

Porto

Mon 11/9

7:20 pm-4:20 pm

1 stop27h 00m

$748

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Tue 10/20

9:55 am-10:30 am

2 stops18h 35m

Porto

Mon 11/9

5:00 am-9:45 pm

2 stops22h 45m

$826

Quickest round-trip

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 11/1

1:00 pm-9:05 am

2 stops14h 05m

Porto

Fri 11/6

5:00 am-9:45 pm

2 stops22h 45m

$843

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Tue 6/2

10:15 am-6:45 am

2 stops14h 30m

Porto

Wed 6/10

8:25 am-9:35 am

2 stops31h 10m

$966

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Chicago to Porto

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Delays

Layovers

What is the typical price of a round-trip flight between Chicago and Porto?

What is the cheapest month to fly to Porto?

The month of September is, on average, the cheapest month to fly to Porto from Chicago, with most prices found around $355. If you aren’t able to travel during the month of September, then book flights to Porto from Chicago during May instead. Flights to Porto in May, while not as cheap as those in September, still average around $372.

How far in advance should I book a flight from Chicago to Porto?

You are more likely to see cheaper flights to Porto from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $729 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Chicago for as low as $540 on momondo.

Can stopping save me money on Chicago to Porto flights?

You could potentially save up to 23% on your flight if you consider stops on a Chicago to Porto flight.

When to book flights from Chicago to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to Porto according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Chicago to Porto (CHI to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Porto

Fastest flight time	14h 05m
Direct flights	None

The fastest flight from Chicago to Porto takes 14h 05m

There are no direct flights from Chicago to Porto. There are no popular flight routes from Chicago to Porto.

Search flight deals

Frequently asked questions about flying from Chicago to Porto

How far is Chicago to Porto by plane?
A flight from Chicago to Porto will travel around 3927.7 mi. By plane, this route typically takes 14h 05m.
When did momondo last update prices for flights from Chicago to Porto Airport?
Prices for flights from Chicago to Porto Airport refresh daily.
How many operators does momondo search for flights from Chicago to Porto Airport?
As of May 2026, there are 6 operators available to choose from for flights from Chicago to Porto Airport.
How old do you have to be to fly from Chicago to Porto Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Porto Airport.
What documentation or ID do you need to fly to Porto Airport?
The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Chicago to Porto?
Based on momondo bookings for flights between Chicago and Porto, the leading airline is TAP AIR PORTUGAL, making up 50% of the total bookings. Other popular airlines include United Airlines with 36%, Iberia with 8%, and Lufthansa with 6%.

Best airlines flying from Chicago to Porto

Compare and see reviews for airlines that fly from Chicago to Porto with momondo

Airline	Rating	Free Cancellation	Price
TAP AIR PORTUGAL	PriceFrom $450	Free Cancellation	Rating 7.2 2,253 reviews	Search TAP AIR PORTUGAL flights
United Airlines	PriceFrom $497	Free Cancellation	Rating 7.4 9,723 reviews	Search United Airlines flights
Lufthansa	PriceFrom $507	Free Cancellation	Rating 6.8 8,003 reviews	Search Lufthansa flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.1 11,662 reviews	Search American Airlines flights
KLM	PriceFrom $531	Free Cancellation	Rating 7.8 1,517 reviews	Search KLM flights
Iberia	PriceFrom $584	Free Cancellation	Rating 7.0 3,217 reviews	Search Iberia flights

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Coimbra

Braga

Aveiro

Matosinhos

Lamego

Esposende

Chaves

Pinhao

Espinho

Guimarães

Arcos de Valdevez

Viseu

Ponte de Lima

Curia

Penafiel

Mesao Frio

Mira

Baiao

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Porto?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Chicago to Porto. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Chicago to Porto with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Chicago to Porto flights to just show those with flexible booking policies.

How can momondo help me find flights from Chicago to Porto?

momondo provides multiple filters to help you find the best flight to Porto from Chicago. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Chicago to Porto right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Chicago to Porto flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Cheap flights from Chicago to Porto from $359

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Porto departing on 10/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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How to get the cheapest flight ticket from Chicago to Porto

What is the typical price of a round-trip flight between Chicago and Porto?

What is the cheapest month to fly to Porto?

How far in advance should I book a flight from Chicago to Porto?

Can stopping save me money on Chicago to Porto flights?

What is the cheapest airline that flies from Chicago to Porto?

What airlines fly to Porto?

How often are flights from Chicago to Porto delayed?

What is the most punctual flight time for Chicago to Porto flights?

What day of the week experiences the fewest flight delays on this route?

Which airport is the most popular layover for flights between Chicago and Porto?

Which layover airport offers the lowest fares from Chicago to Porto?

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

Which layover airport has the shortest connection time from Chicago to Porto?

When to book flights from Chicago to Porto

Cheap Chicago to Porto (CHI to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Porto

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Frequently asked questions about flying from Chicago to Porto

Best airlines flying from Chicago to Porto

Compare and see reviews for airlines that fly from Chicago to Porto with momondo

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Why use momondo?

An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

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Find better results for your trip to Portugal

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List of cabin classes available on flights landing in Porto. Availability may vary depending on flight origin and airline.

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