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

Flights connecting via Lisbon (LIS) have the shortest average one-way travel time: 12h 09m.

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

Flights via Lisbon (LIS) offer the lowest average round-trip price of $791.

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 53% 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.

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

Frankfurt am Main (FRA) has the shortest average layover time for this route: 1h 50m.

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

Lisbon (LIS) was the most common stop: 66% of momondo users choosing 1-stop flights on this route connected there.

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

TAP AIR PORTUGAL, Air France, and United Airlines are the most popular carriers operating from Chicago to Porto

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 November 2026, there are 5 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.

$297 Cheap Flights from Chicago to Porto in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago to Porto

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One-way

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Cheap round-trip flights

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8:10 pm - 11:45 pmORD Chicago O'Hare Intl-OPO Porto

21h 35m1 stop Lisbon Humberto Delgado

7:00 am - 3:30 pmOPO Porto-ORD Chicago O'Hare Intl

14h 30m1 stop Lisbon Humberto Delgado

$547TAP AIR PORTUGAL

Sun, Mar 7 - Sun, Mar 14

8:10 pm - 11:45 pmORD Chicago O'Hare Intl-OPO Porto

21h 35m1 stop Lisbon Humberto Delgado

5:00 am - 3:30 pmOPO Porto-ORD Chicago O'Hare Intl

16h 30m1 stop Lisbon Humberto Delgado

$549TAP AIR PORTUGAL

Sun, Mar 7 - Sun, Mar 14

7:10 pm - 11:05 amORD Chicago O'Hare Intl-OPO Porto

33h 55m1 stop Kastrup Copenhagen

5:45 pm - 4:45 pmOPO Porto-ORD Chicago O'Hare Intl

29h 00m1 stop Kastrup Copenhagen

$674Scandinavian Airlines

Sat, Mar 6 - Fri, Mar 12

7:10 pm - 11:05 amORD Chicago O'Hare Intl-OPO Porto

33h 55m1 stop Kastrup Copenhagen

11:55 am - 5:45 pmOPO Porto-ORD Chicago O'Hare Intl

34h 50m1 stop Kastrup Copenhagen

$674Scandinavian Airlines

Mon, Mar 8 - Wed, Mar 17

4:45 pm - 9:30 amORD Chicago O'Hare Intl-OPO Porto

11h 45m1 stop Newark

6:00 am - 2:50 pmOPO Porto-ORD Chicago O'Hare Intl

14h 50m1 stop Frankfurt am Main

$732United Airlines

Tue, Mar 23 - Tue, Mar 30

2:30 pm - 9:30 amORD Chicago O'Hare Intl-OPO Porto

13h 00m1 stop Newark

6:00 am - 3:20 pmOPO Porto-ORD Chicago O'Hare Intl

15h 20m1 stop Frankfurt am Main

$733United Airlines

Sun, Mar 7 - Thu, Mar 11

11:30 am - 7:40 amORD Chicago O'Hare Intl-OPO Porto

14h 10m2 stops New York John F Kennedy Intl Madrid Barajas

8:20 am - 9:00 pmOPO Porto-ORD Chicago O'Hare Intl

18h 40m2 stops Madrid Barajas Boston Logan Intl

$736Iberia

Wed, Apr 7 - Wed, Apr 14

11:45 am - 3:25 pmORD Chicago O'Hare Intl-OPO Porto

21h 40m1 stop Istanbul

10:55 am - 10:00 amOPO Porto-ORD Chicago O'Hare Intl

29h 05m1 stop Istanbul

$743Turkish Airlines

Wed, Dec 2 - Wed, Dec 9

11:45 am - 3:25 pmORD Chicago O'Hare Intl-OPO Porto

21h 40m1 stop Istanbul

10:55 am - 6:20 pmOPO Porto-ORD Chicago O'Hare Intl

37h 25m1 stop Istanbul

$752Turkish Airlines

Wed, Dec 2 - Tue, Dec 8

5:40 pm - 8:00 pmORD Chicago O'Hare Intl-OPO Porto

20h 20m1 stop Madrid Barajas

9:55 pm - 1:45 pmOPO Porto-ORD Chicago O'Hare Intl

21h 50m2 stops Barcelona-El Prat London Heathrow

$769Iberia

Wed, Feb 10 - Mon, Feb 15

Cheap last minute flights

Enter your travel dates to find the best prices.

7:00 pm - 5:00 pmORD Chicago O'Hare Intl-OPO Porto

16h 00m1 stop Lisbon Humberto Delgado

8:00 pm - 3:30 pmOPO Porto-ORD Chicago O'Hare Intl

25h 30m1 stop Lisbon Humberto Delgado

$646TAP AIR PORTUGAL

Wed, Nov 11 - Tue, Nov 17

7:00 pm - 6:00 pmORD Chicago O'Hare Intl-OPO Porto

17h 00m1 stop Lisbon Humberto Delgado

8:30 am - 3:30 pmOPO Porto-ORD Chicago O'Hare Intl

13h 00m1 stop Lisbon Humberto Delgado

$704TAP AIR PORTUGAL

Wed, Nov 11 - Sun, Nov 15

7:00 pm - 1:30 pmORD Chicago O'Hare Intl-OPO Porto

12h 30m1 stop Lisbon Humberto Delgado

6:30 am - 3:30 pmOPO Porto-ORD Chicago O'Hare Intl

39h 00m2 stops Madrid Barajas Lisbon Humberto Delgado

$731Multiple Airlines

Wed, Nov 11 - Tue, Nov 17

7:00 pm - 1:30 pmORD Chicago O'Hare Intl-OPO Porto

12h 30m1 stop Lisbon Humberto Delgado

8:35 pm - 3:30 pmOPO Porto-ORD Chicago O'Hare Intl

48h 55m2 stops Madrid Barajas Lisbon Humberto Delgado

$735Multiple Airlines

Wed, Nov 11 - Mon, Nov 16

7:00 pm - 1:30 pmORD Chicago O'Hare Intl-OPO Porto

12h 30m1 stop Lisbon Humberto Delgado

10:05 pm - 3:30 pmOPO Porto-ORD Chicago O'Hare Intl

47h 25m2 stops Barcelona-El Prat Lisbon Humberto Delgado

$771Multiple Airlines

Wed, Nov 11 - Mon, Nov 16

9:50 pm - 11:55 pmORD Chicago O'Hare Intl-OPO Porto

20h 05m1 stop Munich Franz Josef Strauss

12:05 pm - 4:15 pmOPO Porto-ORD Chicago O'Hare Intl

34h 10m1 stop Zurich

$784Multiple Airlines

Wed, Nov 11 - Mon, Nov 16

9:50 pm - 11:55 pmORD Chicago O'Hare Intl-OPO Porto

20h 05m1 stop Munich Franz Josef Strauss

1:45 pm - 6:25 pmOPO Porto-ORD Chicago O'Hare Intl

34h 40m1 stop Munich Franz Josef Strauss

$855Lufthansa

Thu, Nov 12 - Mon, Nov 16

1:30 pm - 9:30 amORD Chicago O'Hare Intl-OPO Porto

14h 00m2 stops Washington, D.C. Dulles Intl Newark

6:00 am - 6:51 pmOPO Porto-ORD Chicago O'Hare Intl

18h 51m2 stops Frankfurt am Main Washington, D.C. Dulles Intl

$869United Airlines

Wed, Nov 11 - Mon, Nov 16

1:00 pm - 5:00 pmORD Chicago O'Hare Intl-OPO Porto

22h 00m2 stops Boston Logan Intl Lisbon Humberto Delgado

8:00 pm - 3:30 pmOPO Porto-ORD Chicago O'Hare Intl

25h 30m1 stop Lisbon Humberto Delgado

$991TAP AIR PORTUGAL

Mon, Nov 9 - Sat, Nov 14

8:15 pm - 9:55 amORD Chicago O'Hare Intl-OPO Porto

31h 40m1 stop Istanbul

4:25 pm - 10:00 amOPO Porto-ORD Chicago O'Hare Intl

23h 35m1 stop Istanbul

$1,011Turkish Airlines

Mon, Nov 9 - Sat, Nov 14

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Lufthansa flights from Chicago to Porto

Our best Lufthansa deals on Chicago to Porto flight tickets

Lufthansa

Nov 12

ORD9:50 pmChicago O'Hare Intl

20h 05m

1 stop

OPO11:55 pmPorto

Nov 16

OPO1:45 pmPorto

34h 40m

1 stop

ORD6:25 pmChicago O'Hare Intl

$855

Lufthansa

Nov 21

ORD6:05 pmChicago O'Hare Intl

15h 05m

2 stops

OPO3:10 pmPorto

Nov 28

OPO12:30 pmPorto

29h 40m

2 stops

ORD12:10 pmChicago O'Hare Intl

$1,648

United Airlines flights from Chicago to Porto

Our best United Airlines deals on Chicago to Porto flight tickets

United Airlines

Mar 7

ORD2:30 pmChicago O'Hare Intl

13h 00m

1 stop

OPO9:30 amPorto

Mar 11

OPO6:00 amPorto

15h 20m

1 stop

ORD3:20 pmChicago O'Hare Intl

$733

United Airlines

Mar 7

ORD4:45 pmChicago O'Hare Intl

10h 45m

1 stop

OPO9:30 amPorto

Mar 11

OPO6:00 amPorto

15h 20m

1 stop

ORD3:20 pmChicago O'Hare Intl

$734

United Airlines

Mar 7

ORD1:30 pmChicago O'Hare Intl

14h 00m

2 stops

OPO9:30 amPorto

Mar 11

OPO6:00 amPorto

15h 20m

1 stop

ORD3:20 pmChicago O'Hare Intl

$738

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 3/7

8:10 pm-11:45 pm

1 stop21h 35m

Porto

Sun 3/14

7:00 am-3:30 pm

1 stop14h 30m

$547

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 3/7

8:10 pm-11:45 pm

1 stop21h 35m

Porto

Sun 3/14

5:00 am-3:30 pm

1 stop16h 30m

$549

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sat 3/6

7:10 pm-11:05 am

1 stop33h 55m

Porto

Fri 3/12

5:45 pm-4:45 pm

1 stop29h 00m

$674

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Mon 3/8

7:10 pm-11:05 am

1 stop33h 55m

Porto

Wed 3/17

11:55 am-5:45 pm

1 stop34h 50m

$674

Quickest round-trip

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Tue 3/23

4:45 pm-9:30 am

1 stop11h 45m

Porto

Tue 3/30

6:00 am-2:50 pm

1 stop14h 50m

$732

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 3/7

2:30 pm-9:30 am

1 stop13h 00m

Porto

Thu 3/11

6:00 am-3:20 pm

1 stop15h 20m

$733

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Wed 4/7

11:30 am-7:40 am

2 stops14h 10m

Porto

Wed 4/14

8:20 am-9:00 pm

2 stops18h 40m

$736

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Wed 12/2

11:45 am-3:25 pm

1 stop21h 40m

Porto

Wed 12/9

10:55 am-10:00 am

1 stop29h 05m

$743

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Wed 12/2

11:45 am-3:25 pm

1 stop21h 40m

Porto

Tue 12/8

10:55 am-6:20 pm

1 stop37h 25m

$752

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Wed 2/10

5:40 pm-8:00 pm

1 stop20h 20m

Porto

Mon 2/15

9:55 pm-1:45 pm

2 stops21h 50m

$769

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

Layovers

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

Prices are currently low for flights on this route.

Typical prices usually range from $700 to $786.
The lowest price recently found on this route was $547.

What is the cheapest month to fly to Porto?

The month of January is, on average, the cheapest month to fly to Porto from Chicago, with most prices found around $589. If you aren’t able to travel during the month of January, then book flights to Porto from Chicago during February instead. Flights to Porto in February, while not as cheap as those in January, still average around $689.

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 week ahead of your departure date. In general, you can expect to find flights to Porto for around $890 when searching week 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 $687 on momondo.

Can stopping save me money on Chicago to Porto flights?

You could potentially save up to 11% 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

Best Price Found	$297
Fastest flight time	11h 47m
Direct flights	None

The best one-way flight to Porto from Chicago in the past 72 hours is $297. The best round-trip flight deal from Chicago to Porto found on momondo in the last 72 hours is $547.

The fastest flight from Chicago to Porto takes 11h 47m

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 11h 47m.
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 November 2026, there are 5 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 83% of the total bookings. Other popular airlines include United Airlines with 17%.

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 $480	Free Cancellation	Rating 7.2 2,395 reviews	Search TAP AIR PORTUGAL flights
Iberia	PriceFrom $519	Free Cancellation	Rating 7.0 3,231 reviews	Search Iberia flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.0 12,226 reviews	Search American Airlines flights
Lufthansa	PriceFrom $545	Free Cancellation	Rating 6.8 8,292 reviews	Search Lufthansa flights
Turkish Airlines	PriceFrom $630	Free Cancellation	Rating 7.4 4,468 reviews	Search Turkish Airlines flights
United Airlines	PriceFrom $658	Free Cancellation	Rating 7.3 10,471 reviews	Search United Airlines flights

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Coimbra

Vila Nova de Gaia

Aveiro

Pinhao

Esposende

Matosinhos

Chaves

Viseu

Espinho

Arcos de Valdevez

Lamego

Guimarães

Caminha

Penafiel

Ponte de Lima

Mira

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 $297

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 11/27. 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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Lufthansa flights from Chicago to Porto

Our best Lufthansa deals on Chicago to Porto flight tickets

United Airlines flights from Chicago to Porto

Our best United Airlines deals on Chicago to Porto flight tickets

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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?

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

Best Price Found

Fastest flight time

Direct flights

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

Traveling to a place near Porto?

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

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Airports servicing Portugal

Fly your favorite airline to Porto

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Porto

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

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