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.

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 offers the lowest fares from Chicago to Porto?

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

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

Lisbon (LIS) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

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

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

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 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 October 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.

$212 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

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:10 pm - 3:00 pmORD Chicago O'Hare Intl-OPO Porto

12h 50m1 stop Lisbon Humberto Delgado

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

16h 30m1 stop Lisbon Humberto Delgado

$557TAP AIR PORTUGAL

Fri, Dec 4 - Fri, Dec 11

8:10 pm - 3:00 pmORD Chicago O'Hare Intl-OPO Porto

12h 50m1 stop Lisbon Humberto Delgado

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

14h 30m1 stop Lisbon Humberto Delgado

$557TAP AIR PORTUGAL

Fri, Dec 4 - Fri, Dec 11

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

12h 30m1 stop Lisbon Humberto Delgado

7:05 pm - 3:30 pmOPO Porto-ORD Chicago O'Hare Intl

26h 25m2 stops Malaga Lisbon Humberto Delgado

$586Multiple Airlines

Wed, Nov 11 - Sat, Nov 21

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

12h 30m1 stop Lisbon Humberto Delgado

1:35 pm - 3:30 pmOPO Porto-ORD Chicago O'Hare Intl

31h 55m2 stops Malaga Lisbon Humberto Delgado

$586Multiple Airlines

Wed, Nov 11 - Thu, Nov 19

9:00 am - 9:45 amORD Chicago O'Hare Intl-OPO Porto

18h 45m1 stop Newark

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

14h 50m1 stop Frankfurt am Main

$723United Airlines

Sun, Apr 18 - Thu, Apr 29

10:45 am - 9:45 amORD Chicago O'Hare Intl-OPO Porto

17h 00m1 stop Newark

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

14h 50m1 stop Frankfurt am Main

$723United Airlines

Mon, Apr 19 - Tue, Apr 27

8:05 pm - 9:45 amORD Chicago O'Hare Intl-OPO Porto

31h 40m1 stop Istanbul

10:45 am - 9:35 amOPO Porto-ORD Chicago O'Hare Intl

28h 50m1 stop Istanbul

$726Turkish Airlines

Thu, Apr 8 - Wed, Apr 28

11:20 am - 3:35 pmORD Chicago O'Hare Intl-OPO Porto

22h 15m1 stop Istanbul

4:35 pm - 9:35 amOPO Porto-ORD Chicago O'Hare Intl

23h 00m1 stop Istanbul

$726Turkish Airlines

Tue, Mar 30 - Tue, Apr 20

5:20 pm - 11:40 amORD Chicago O'Hare Intl-OPO Porto

13h 20m1 stop Frankfurt am Main

6:00 am - 2:10 pmOPO Porto-ORD Chicago O'Hare Intl

13h 10m1 stop Frankfurt am Main

$737Lufthansa

Sun, Mar 14 - Fri, Mar 19

4:20 pm - 11:45 amORD Chicago O'Hare Intl-OPO Porto

13h 25m1 stop Frankfurt am Main

6:00 am - 1:10 pmOPO Porto-ORD Chicago O'Hare Intl

13h 10m1 stop Frankfurt am Main

$755Lufthansa

Tue, Jan 26 - Sun, Jan 31

Cheap last minute flights

Enter your travel dates to find the best prices.

9:10 pm - 3:00 pmORD Chicago O'Hare Intl-OPO Porto

12h 50m1 stop Lisbon Humberto Delgado

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

14h 30m1 stop Lisbon Humberto Delgado

$657TAP AIR PORTUGAL

Sun, Oct 25 - Wed, Nov 4

9:10 pm - 10:00 amORD Chicago O'Hare Intl-OPO Porto

31h 50m1 stop Lisbon Humberto Delgado

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

13h 00m1 stop Lisbon Humberto Delgado

$677TAP AIR PORTUGAL

Sun, Oct 25 - Wed, Nov 4

12:50 pm - 6:30 pmORD Chicago O'Hare Intl-OPO Porto

24h 40m2 stops Toronto Pearson Intl Zurich

6:00 am - 8:05 pmOPO Porto-ORD Chicago O'Hare Intl

20h 05m1 stop Frankfurt am Main

$780Multiple Airlines

Sun, Oct 25 - Wed, Nov 4

12:50 pm - 6:30 pmORD Chicago O'Hare Intl-OPO Porto

24h 40m2 stops Toronto Pearson Intl Zurich

12:35 pm - 8:05 pmOPO Porto-ORD Chicago O'Hare Intl

13h 30m1 stop Frankfurt am Main

$785Multiple Airlines

Sun, Oct 25 - Wed, Nov 4

9:00 am - 9:30 amORD Chicago O'Hare Intl-OPO Porto

19h 30m2 stops Washington, D.C. Reagan-National Newark

6:00 am - 12:01 amOPO Porto-ORD Chicago O'Hare Intl

24h 01m2 stops Frankfurt am Main Newark

$808United Airlines

Sun, Oct 25 - Wed, Nov 4

5:55 am - 9:30 amORD Chicago O'Hare Intl-OPO Porto

22h 35m2 stops Washington, D.C. Dulles Intl Newark

6:00 am - 9:20 pmOPO Porto-ORD Chicago O'Hare Intl

21h 20m2 stops Frankfurt am Main New York John F Kennedy Intl

$808United Airlines

Sun, Oct 25 - Wed, Nov 4

9:10 pm - 5:00 pmORD Chicago O'Hare Intl-OPO Porto

14h 50m1 stop Lisbon Humberto Delgado

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

14h 30m1 stop Lisbon Humberto Delgado

$809TAP AIR PORTUGAL

Sun, Oct 25 - Wed, Nov 4

9:15 pm - 3:25 pmORD Chicago O'Hare Intl-OPO Porto

37h 10m1 stop Istanbul

10:55 am - 8:20 pmOPO Porto-ORD Chicago O'Hare Intl

38h 25m1 stop Istanbul

$1,026Turkish Airlines

Sat, Oct 24 - Sat, Oct 31

3:37 pm - 11:45 amORD Chicago O'Hare Intl-OPO Porto

14h 08m2 stops Philadelphia Madrid Barajas

8:45 am - 2:55 pmOPO Porto-ORD Chicago O'Hare Intl

36h 10m2 stops Barcelona-El Prat Madrid Barajas

$1,277Iberia

Fri, Oct 23 - Sun, Nov 1

7:35 pm - 8:00 pmORD Chicago O'Hare Intl-OPO Porto

19h 25m2 stops London Heathrow Madrid Barajas

9:55 pm - 3:55 pmOPO Porto-ORD Chicago O'Hare Intl

47h 00m2 stops Barcelona-El Prat Madrid Barajas

$1,313Iberia

Sun, Oct 25 - Sat, Oct 31

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United Airlines flights from Chicago to Porto

Our best United Airlines deals on Chicago to Porto flight tickets

United Airlines

Apr 18

ORD11:45 amChicago O'Hare Intl

16h 00m

1 stop

OPO9:45 amPorto

Apr 28

OPO6:00 amPorto

14h 50m

1 stop

ORD2:50 pmChicago O'Hare Intl

$723

United Airlines

Mar 6

ORD7:45 pmChicago O'Hare Intl

31h 45m

2 stops

OPO9:30 amPorto

Mar 16

OPO6:00 amPorto

15h 20m

1 stop

ORD4:20 pmChicago O'Hare Intl

$733

United Airlines

Apr 17

ORD9:30 pmChicago O'Hare Intl

30h 15m

1 stop

OPO9:45 amPorto

Apr 30

OPO6:00 amPorto

14h 50m

1 stop

ORD2:50 pmChicago O'Hare Intl

$734

Scandinavian Airlines flights from Chicago to Porto

Our best Scandinavian Airlines deals on Chicago to Porto flight tickets

Scandinavian Airlines

Jan 16

ORD7:10 pmChicago O'Hare Intl

34h 55m

1 stop

OPO12:05 pmPorto

Jan 22

OPO5:45 pmPorto

29h 00m

1 stop

ORD4:45 pmChicago O'Hare Intl

$710

Scandinavian Airlines

Dec 5

ORD7:10 pmChicago O'Hare Intl

34h 55m

1 stop

OPO12:05 pmPorto

Dec 11

OPO5:45 pmPorto

29h 00m

1 stop

ORD4:45 pmChicago O'Hare Intl

$726

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Fri 12/4

8:10 pm-3:00 pm

1 stop12h 50m

Porto

Fri 12/11

5:00 am-3:30 pm

1 stop16h 30m

$557

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Fri 12/4

8:10 pm-3:00 pm

1 stop12h 50m

Porto

Fri 12/11

7:00 am-3:30 pm

1 stop14h 30m

$557

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Wed 11/11

7:00 pm-1:30 pm

1 stop12h 30m

Porto

Sat 11/21

7:05 pm-3:30 pm

2 stops26h 25m

$586

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Wed 11/11

7:00 pm-1:30 pm

1 stop12h 30m

Porto

Thu 11/19

1:35 pm-3:30 pm

2 stops31h 55m

$586

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 4/18

9:00 am-9:45 am

1 stop18h 45m

Porto

Thu 4/29

6:00 am-2:50 pm

1 stop14h 50m

$723

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Mon 4/19

10:45 am-9:45 am

1 stop17h 00m

Porto

Tue 4/27

6:00 am-2:50 pm

1 stop14h 50m

$723

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Thu 4/8

8:05 pm-9:45 am

1 stop31h 40m

Porto

Wed 4/28

10:45 am-9:35 am

1 stop28h 50m

$726

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Tue 3/30

11:20 am-3:35 pm

1 stop22h 15m

Porto

Tue 4/20

4:35 pm-9:35 am

1 stop23h 00m

$726

Quickest round-trip

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 3/14

5:20 pm-11:40 am

1 stop13h 20m

Porto

Fri 3/19

6:00 am-2:10 pm

1 stop13h 10m

$737

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Tue 1/26

4:20 pm-11:45 am

1 stop13h 25m

Porto

Sun 1/31

6:00 am-1:10 pm

1 stop13h 10m

$755

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 $751 to $946.
The lowest price recently found on this route was $557.

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 $634. If you aren’t able to travel during the month of January, then book flights to Porto from Chicago during April instead. Flights to Porto in April, while not as cheap as those in January, still average around $688.

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 $863 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 $715 on momondo.

Can stopping save me money on Chicago to Porto flights?

You could potentially save up to 21% 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	$212
Fastest flight time	11h 47m
Direct flights	None

The best one-way flight to Porto from Chicago in the past 72 hours is $212. The best round-trip flight deal from Chicago to Porto found on momondo in the last 72 hours is $557.

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 October 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 82% of the total bookings. Other popular airlines include United Airlines with 18%.

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 $462	Free Cancellation	Rating 7.2 2,384 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $507	Free Cancellation	Rating 6.8 8,288 reviews	Search Lufthansa flights
Iberia	PriceFrom $519	Free Cancellation	Rating 7.0 3,243 reviews	Search Iberia flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.0 12,186 reviews	Search American Airlines flights
United Airlines	PriceFrom $623	Free Cancellation	Rating 7.3 10,404 reviews	Search United Airlines flights
Turkish Airlines	PriceFrom $630	Free Cancellation	Rating 7.4 4,461 reviews	Search Turkish Airlines flights

Coimbra

Braga

Vila Nova de Gaia

Aveiro

Pinhao

Matosinhos

Esposende

Chaves

Viseu

Espinho

Arcos de Valdevez

Guimarães

Lamego

Ponte de Lima

Caminha

Penafiel

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 $212

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 11/13. 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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United Airlines flights from Chicago to Porto

Our best United Airlines deals on Chicago to Porto flight tickets

Scandinavian Airlines flights from Chicago to Porto

Our best Scandinavian 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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Popular flights according to clicks in the last 7 days on momondo

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