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

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

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: 67% of momondo users choosing 1-stop flights on this route connected there.

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 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.

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.

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 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.

$298 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

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

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

19h 50m1 stop Lisbon Humberto Delgado

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

16h 30m1 stop Lisbon Humberto Delgado

$548TAP AIR PORTUGAL

Sun, Nov 29 - Sun, Dec 6

8:10 pm - 5:00 pmORD Chicago O'Hare Intl-OPO Porto

14h 50m1 stop Lisbon Humberto Delgado

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

16h 30m1 stop Lisbon Humberto Delgado

$556TAP AIR PORTUGAL

Sun, Dec 13 - Fri, Jan 15

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

33h 55m1 stop Kastrup Copenhagen

11:55 am - 4:45 pmOPO Porto-ORD Chicago O'Hare Intl

34h 50m1 stop Kastrup Copenhagen

$703Scandinavian Airlines

Mon, Mar 1 - Wed, Mar 10

7:15 pm - 8:40 amORD Chicago O'Hare Intl-OPO Porto

31h 25m1 stop Kastrup Copenhagen

5:55 pm - 4:10 pmOPO Porto-ORD Chicago O'Hare Intl

28h 15m1 stop Kastrup Copenhagen

$704Scandinavian Airlines

Thu, Apr 8 - Fri, Apr 16

10:45 am - 9:30 amORD Chicago O'Hare Intl-OPO Porto

17h 45m1 stop Newark

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

14h 50m1 stop Frankfurt am Main

$723United Airlines

Sun, Mar 21 - Tue, Mar 30

7:10 am - 9:30 amORD Chicago O'Hare Intl-OPO Porto

20h 20m1 stop Newark

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

13h 10m1 stop Frankfurt am Main

$723United Airlines

Wed, Feb 24 - Thu, Mar 4

12:45 pm - 3:25 pmORD Chicago O'Hare Intl-OPO Porto

21h 40m1 stop Istanbul

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

28h 50m1 stop Istanbul

$725Turkish Airlines

Thu, Mar 25 - Fri, Apr 2

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

9:50 pm - 11:40 pmORD Chicago O'Hare Intl-OPO Porto

19h 50m1 stop Munich Franz Josef Strauss

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

13h 10m1 stop Frankfurt am Main

$749Lufthansa

Fri, Feb 5 - Fri, Feb 12

5:20 pm - 12:50 pmORD Chicago O'Hare Intl-OPO Porto

14h 30m2 stops Frankfurt am Main Munich Franz Josef Strauss

6:00 am - 7:55 pmOPO Porto-ORD Chicago O'Hare Intl

19h 55m1 stop Frankfurt am Main

$760Lufthansa

Sun, Mar 21 - Tue, Mar 30

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

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

16h 30m1 stop Lisbon Humberto Delgado

$557TAP AIR PORTUGAL

Sun, Oct 25 - Wed, Nov 4

6:00 pm - 9:00 amORD Chicago O'Hare Intl-OPO Porto

33h 00m1 stop Lisbon Humberto Delgado

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

14h 30m1 stop Lisbon Humberto Delgado

$595TAP AIR PORTUGAL

Thu, Oct 22 - Wed, Nov 4

9:10 pm - 12:30 amORD Chicago O'Hare Intl-OPO Porto

22h 20m1 stop Lisbon Humberto Delgado

6:00 pm - 7:17 pmOPO Porto-ORD Chicago O'Hare Intl

31h 17m2 stops Lisbon Humberto Delgado Boston Logan Intl

$831TAP AIR PORTUGAL

Sun, Oct 25 - Wed, Nov 4

7:50 pm - 6:30 pmORD Chicago O'Hare Intl-OPO Porto

17h 40m1 stop Zurich

7:20 pm - 4:15 pmOPO Porto-ORD Chicago O'Hare Intl

26h 55m1 stop Zurich

$834SWISS

Sun, Oct 25 - Sun, Nov 1

6:00 pm - 12:40 amORD Chicago O'Hare Intl-OPO Porto

24h 40m1 stop Lisbon Humberto Delgado

8:00 pm - 7:17 pmOPO Porto-ORD Chicago O'Hare Intl

29h 17m2 stops Lisbon Humberto Delgado Boston Logan Intl

$843TAP AIR PORTUGAL

Thu, Oct 22 - Wed, Nov 4

4:30 pm - 6:30 pmORD Chicago O'Hare Intl-OPO Porto

21h 00m2 stops Toronto Pearson Intl Zurich

7:20 pm - 4:15 pmOPO Porto-ORD Chicago O'Hare Intl

26h 55m1 stop Zurich

$854Multiple Airlines

Sun, Oct 25 - Sun, Nov 1

10:24 am - 8:30 amORD Chicago O'Hare Intl-OPO Porto

16h 06m2 stops Boston Logan Intl Paris Charles de Gaulle

5:00 am - 8:30 pmOPO Porto-ORD Chicago O'Hare Intl

21h 30m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$859Delta

Thu, Oct 22 - Wed, Nov 4

7:30 am - 9:45 amORD Chicago O'Hare Intl-OPO Porto

20h 15m1 stop Newark

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

13h 10m1 stop Frankfurt am Main

$1,051United Airlines

Thu, Oct 22 - Thu, Oct 29

7:47 pm - 7:10 amORD Chicago O'Hare Intl-OPO Porto

29h 23m2 stops Washington, D.C. Dulles Intl Montreal Pierre Elliott Trudeau Intl

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

13h 10m1 stop Frankfurt am Main

$1,054United Airlines

Thu, Oct 22 - Thu, Oct 29

7:47 pm - 7:10 amORD Chicago O'Hare Intl-OPO Porto

29h 23m2 stops Washington, D.C. Dulles Intl Montreal Pierre Elliott Trudeau Intl

6:00 am - 9:44 pmOPO Porto-ORD Chicago O'Hare Intl

20h 44m2 stops Frankfurt am Main Washington, D.C. Dulles Intl

$1,064United Airlines

Thu, Oct 22 - Thu, Oct 29

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Scandinavian Airlines flights from Chicago to Porto

Our best Scandinavian Airlines deals on Chicago to Porto flight tickets

Scandinavian Airlines

Mar 1

ORD7:10 pmChicago O'Hare Intl

33h 55m

1 stop

OPO11:05 amPorto

Mar 10

OPO11:55 amPorto

34h 50m

1 stop

ORD4:45 pmChicago O'Hare Intl

$703

Scandinavian Airlines

Nov 1

ORD7:10 pmChicago O'Hare Intl

33h 20m

2 stops

OPO10:30 amPorto

Nov 8

OPO5:35 pmPorto

53h 45m

2 stops

ORD5:20 pmChicago O'Hare Intl

$1,000

Scandinavian Airlines

Nov 1

ORD7:10 pmChicago O'Hare Intl

45h 20m

2 stops

OPO10:30 pmPorto

Nov 8

OPO5:35 pmPorto

53h 45m

2 stops

ORD5:20 pmChicago O'Hare Intl

$1,030

Turkish Airlines flights from Chicago to Porto

Our best Turkish Airlines deals on Chicago to Porto flight tickets

Turkish Airlines

Mar 25

ORD12:45 pmChicago O'Hare Intl

21h 40m

1 stop

OPO3:25 pmPorto

Apr 2

OPO10:45 amPorto

28h 50m

1 stop

ORD9:35 amChicago O'Hare Intl

$725

Turkish Airlines

Mar 30

ORD8:05 pmChicago O'Hare Intl

37h 30m

1 stop

OPO3:35 pmPorto

Apr 20

OPO4:35 pmPorto

31h 35m

1 stop

ORD6:10 pmChicago O'Hare Intl

$726

Turkish Airlines

Mar 25

ORD12:45 pmChicago O'Hare Intl

21h 40m

1 stop

OPO3:25 pmPorto

Apr 2

OPO10:45 amPorto

28h 50m

1 stop

ORD9:35 amChicago O'Hare Intl

$730

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 11/29

8:10 pm-10:00 pm

1 stop19h 50m

Porto

Sun 12/6

5:00 am-3:30 pm

1 stop16h 30m

$548

Quickest round-trip

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 12/13

8:10 pm-5:00 pm

1 stop14h 50m

Porto

Fri 1/15

5:00 am-3:30 pm

1 stop16h 30m

$556

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Mon 3/1

7:10 pm-11:05 am

1 stop33h 55m

Porto

Wed 3/10

11:55 am-4:45 pm

1 stop34h 50m

$703

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Thu 4/8

7:15 pm-8:40 am

1 stop31h 25m

Porto

Fri 4/16

5:55 pm-4:10 pm

1 stop28h 15m

$704

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 3/21

10:45 am-9:30 am

1 stop17h 45m

Porto

Tue 3/30

6:00 am-2:50 pm

1 stop14h 50m

$723

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Wed 2/24

7:10 am-9:30 am

1 stop20h 20m

Porto

Thu 3/4

6:00 am-1:10 pm

1 stop13h 10m

$723

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Thu 3/25

12:45 pm-3:25 pm

1 stop21h 40m

Porto

Fri 4/2

10:45 am-9:35 am

1 stop28h 50m

$725

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

Fri 2/5

9:50 pm-11:40 pm

1 stop19h 50m

Porto

Fri 2/12

6:00 am-1:10 pm

1 stop13h 10m

$749

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 3/21

5:20 pm-12:50 pm

2 stops14h 30m

Porto

Tue 3/30

6:00 am-7:55 pm

1 stop19h 55m

$760

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 $774 to $1,022.
The lowest price recently found on this route was $548.

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	$298
Fastest flight time	12h 30m
Direct flights	None

The best one-way flight to Porto from Chicago in the past 72 hours is $298. The best round-trip flight deal from Chicago to Porto found on momondo in the last 72 hours is $548.

The fastest flight from Chicago to Porto takes 12h 30m

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 12h 30m.
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 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 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 $451	Free Cancellation	Rating 7.2 2,381 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $474	Free Cancellation	Rating 6.8 8,279 reviews	Search Lufthansa flights
Iberia	PriceFrom $519	Free Cancellation	Rating 7.0 3,242 reviews	Search Iberia flights
Turkish Airlines	PriceFrom $618	Free Cancellation	Rating 7.4 4,454 reviews	Search Turkish Airlines flights
United Airlines	PriceFrom $623	Free Cancellation	Rating 7.3 10,389 reviews	Search United 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.

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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Wed 11/18

Wed 11/25

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal

Nearby airports

Airlines

Cabin classes

Other Portugal destinations

Other flights from Chicago

Complete your trip

Feeling lucky

Airports servicing Portugal

Faro Airport

Lisbon Humberto Delgado Airport

Azores Airport

Madeira Airport

Algarve Airport

Cheap flights from Chicago to Porto from $298

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 11/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Chicago to Porto

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Scandinavian Airlines flights from Chicago to Porto

Our best Scandinavian Airlines deals on Chicago to Porto flight tickets

Turkish Airlines flights from Chicago to Porto

Our best Turkish Airlines deals on Chicago to Porto flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Chicago to Porto that are best for you.

See travel insights to Porto from

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.

Popular cities in Portugal

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

Fly to other destinations from Chicago

According to popular flight searches on momondo this year

Complete your trip to Porto

Explore popular destinations other users love

According to popular flight searches on momondo this year