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 03m.

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

Flights via Amsterdam (AMS) offer the lowest average round-trip price of $777.

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 7 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

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

Lisbon (LIS) was the most common stop: 65% of momondo users choosing 1-stop flights on this route connected there.

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

United Airlines and Delta 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 41m.

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 September 2026, there are 7 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.

$232 Cheap Flights from Chicago to Porto in 2026

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.

6:05 pm - 8:25 pmORD Chicago O'Hare Intl-OPO Porto

20h 20m1 stop Lisbon Humberto Delgado

6:00 pm - 12:40 pmOPO Porto-ORD Chicago O'Hare Intl

24h 40m1 stop Lisbon Humberto Delgado

$625TAP AIR PORTUGAL

Sat, Oct 10 - Wed, Oct 21

6:05 pm - 8:25 pmORD Chicago O'Hare Intl-OPO Porto

20h 20m1 stop Lisbon Humberto Delgado

9:15 pm - 12:40 pmOPO Porto-ORD Chicago O'Hare Intl

21h 25m1 stop Lisbon Humberto Delgado

$626TAP AIR PORTUGAL

Sat, Oct 10 - Wed, Oct 21

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

21h 35m2 stops Lisbon Humberto Delgado Madrid Barajas

2:40 pm - 3:30 pmOPO Porto-ORD Chicago O'Hare Intl

30h 50m2 stops Madrid Barajas Lisbon Humberto Delgado

$681Multiple Airlines

Sun, Nov 1 - Sat, Nov 7

7:15 pm - 11:05 amORD Chicago O'Hare Intl-OPO Porto

33h 50m1 stop Kastrup Copenhagen

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

34h 50m1 stop Kastrup Copenhagen

$687Scandinavian Airlines

Mon, Nov 9 - Wed, Nov 18

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

19h 30m1 stop Newark

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

13h 10m1 stop Frankfurt am Main

$712United Airlines

Mon, Oct 26 - Fri, Nov 6

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

14h 00m1 stop Newark

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

13h 10m1 stop Frankfurt am Main

$712United Airlines

Wed, Oct 28 - Fri, Nov 6

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

20h 05m1 stop Munich Franz Josef Strauss

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

13h 30m1 stop Frankfurt am Main

$725Lufthansa

Wed, Nov 18 - Fri, Dec 4

6:40 pm - 11:45 amORD Chicago O'Hare Intl-OPO Porto

12h 05m1 stop Madrid Barajas

8:40 pm - 2:55 pmOPO Porto-ORD Chicago O'Hare Intl

24h 15m1 stop Madrid Barajas

$738American Airlines

Tue, Oct 27 - Mon, Nov 16

10:34 am - 7:40 amORD Chicago O'Hare Intl-OPO Porto

16h 06m2 stops New York John F Kennedy Intl Madrid Barajas

8:40 pm - 2:55 pmOPO Porto-ORD Chicago O'Hare Intl

24h 15m1 stop Madrid Barajas

$742American Airlines

Tue, Oct 27 - Mon, Nov 16

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

19h 50m1 stop Munich Franz Josef Strauss

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

34h 40m1 stop Munich Franz Josef Strauss

$792Lufthansa

Fri, Nov 6 - Mon, Nov 23

Cheap last minute flights

Enter your travel dates to find the best prices.

11:01 am - 10:55 amORD Chicago O'Hare Intl-OPO Porto

17h 54m1 stop Boston Logan Intl

5:05 am - 12:40 pmOPO Porto-ORD Chicago O'Hare Intl

13h 35m1 stop Lisbon Humberto Delgado

$1,069TAP AIR PORTUGAL

Mon, Sep 7 - Thu, Sep 10

7:05 pm - 7:55 amORD Chicago O'Hare Intl-OPO Porto

30h 50m1 stop Zurich

7:20 pm - 12:35 pmOPO Porto-ORD Chicago O'Hare Intl

23h 15m1 stop Zurich

$1,156SWISS

Tue, Sep 8 - Sun, Sep 13

7:05 pm - 6:30 pmORD Chicago O'Hare Intl-OPO Porto

17h 25m1 stop Zurich

7:20 pm - 12:35 pmOPO Porto-ORD Chicago O'Hare Intl

23h 15m1 stop Zurich

$1,156SWISS

Wed, Sep 9 - Sun, Sep 13

3:35 pm - 10:20 amORD Chicago O'Hare Intl-OPO Porto

12h 45m1 stop Munich Franz Josef Strauss

4:35 pm - 12:55 pmOPO Porto-ORD Chicago O'Hare Intl

26h 20m1 stop Frankfurt am Main

$1,217Lufthansa

Wed, Sep 9 - Mon, Sep 14

5:00 am - 9:45 amORD Chicago O'Hare Intl-OPO Porto

22h 45m1 stop Newark

12:20 pm - 2:52 pmOPO Porto-ORD Chicago O'Hare Intl

32h 32m1 stop Montreal Pierre Elliott Trudeau Intl

$1,334United Airlines

Sat, Sep 5 - Sat, Sep 12

6:00 am - 9:45 amORD Chicago O'Hare Intl-OPO Porto

21h 45m1 stop Newark

12:20 pm - 2:52 pmOPO Porto-ORD Chicago O'Hare Intl

32h 32m1 stop Montreal Pierre Elliott Trudeau Intl

$1,334United Airlines

Sat, Sep 5 - Sat, Sep 12

11:01 am - 10:55 amORD Chicago O'Hare Intl-OPO Porto

17h 54m1 stop Boston Logan Intl

5:05 am - 12:40 pmOPO Porto-ORD Chicago O'Hare Intl

13h 35m1 stop Lisbon Humberto Delgado

$1,374TAP AIR PORTUGAL

Mon, Sep 7 - Thu, Sep 10

11:01 am - 10:55 amORD Chicago O'Hare Intl-OPO Porto

17h 54m1 stop Boston Logan Intl

5:05 am - 12:40 pmOPO Porto-ORD Chicago O'Hare Intl

13h 35m1 stop Lisbon Humberto Delgado

$1,464TAP AIR PORTUGAL

Mon, Sep 7 - Thu, Sep 10

11:15 am - 7:40 amORD Chicago O'Hare Intl-OPO Porto

14h 25m2 stops New York John F Kennedy Intl Madrid Barajas

8:20 am - 7:38 pmOPO Porto-ORD Chicago O'Hare Intl

17h 18m2 stops Madrid Barajas Charlotte Douglas

$2,454Iberia

Mon, Sep 7 - Wed, Sep 16

11:15 am - 7:40 amORD Chicago O'Hare Intl-OPO Porto

14h 25m2 stops New York John F Kennedy Intl Madrid Barajas

8:20 am - 9:30 pmOPO Porto-ORD Chicago O'Hare Intl

19h 10m2 stops Madrid Barajas Philadelphia

$2,454Iberia

Mon, Sep 7 - Wed, Sep 16

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TAP AIR PORTUGAL flights from Chicago to Porto

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

TAP AIR PORTUGAL

Oct 10

ORD6:05 pmChicago O'Hare Intl

20h 20m

1 stop

OPO8:25 pmPorto

Oct 21

OPO6:00 pmPorto

24h 40m

1 stop

ORD12:40 pmChicago O'Hare Intl

$625

TAP AIR PORTUGAL

Oct 10

ORD6:05 pmChicago O'Hare Intl

20h 20m

1 stop

OPO8:25 pmPorto

Oct 21

OPO9:15 pmPorto

21h 25m

1 stop

ORD12:40 pmChicago O'Hare Intl

$626

TAP AIR PORTUGAL

Nov 18

ORD7:00 pmChicago O'Hare Intl

23h 30m

1 stop

OPO12:30 amPorto

Dec 2

OPO5:00 amPorto

16h 30m

1 stop

ORD3:30 pmChicago O'Hare Intl

$628

KLM flights from Chicago to Porto

Our best KLM deals on Chicago to Porto flight tickets

KLM

Sep 18

MDW7:01 pmChicago Midway

14h 29m

2 stops

OPO3:30 pmPorto

Oct 2

OPO5:55 amPorto

16h 20m

2 stops

MDW4:15 pmChicago Midway

$1,695

KLM

Sep 18

MDW7:01 pmChicago Midway

14h 29m

2 stops

OPO3:30 pmPorto

Oct 2

OPO5:55 amPorto

16h 20m

2 stops

MDW4:15 pmChicago Midway

$1,805

KLM

Sep 18

MDW7:01 pmChicago Midway

14h 29m

2 stops

OPO3:30 pmPorto

Sep 27

OPO12:25 pmPorto

16h 19m

2 stops

MDW10:44 pmChicago Midway

$2,766

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sat 10/10

6:05 pm-8:25 pm

1 stop20h 20m

Porto

Wed 10/21

6:00 pm-12:40 pm

1 stop24h 40m

$625

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sat 10/10

6:05 pm-8:25 pm

1 stop20h 20m

Porto

Wed 10/21

9:15 pm-12:40 pm

1 stop21h 25m

$626

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 11/1

8:10 pm-11:45 pm

2 stops21h 35m

Porto

Sat 11/7

2:40 pm-3:30 pm

2 stops30h 50m

$681

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Mon 11/9

7:15 pm-11:05 am

1 stop33h 50m

Porto

Wed 11/18

11:55 am-4:45 pm

1 stop34h 50m

$687

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Mon 10/26

9:00 am-9:30 am

1 stop19h 30m

Porto

Fri 11/6

6:00 am-1:10 pm

1 stop13h 10m

$712

Quickest round-trip

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Wed 10/28

2:30 pm-9:30 am

1 stop14h 00m

Porto

Fri 11/6

6:00 am-1:10 pm

1 stop13h 10m

$712

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Wed 11/18

9:50 pm-11:55 pm

1 stop20h 05m

Porto

Fri 12/4

12:35 pm-8:05 pm

1 stop13h 30m

$725

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Tue 10/27

6:40 pm-11:45 am

1 stop12h 05m

Porto

Mon 11/16

8:40 pm-2:55 pm

1 stop24h 15m

$738

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Tue 10/27

10:34 am-7:40 am

2 stops16h 06m

Porto

Mon 11/16

8:40 pm-2:55 pm

1 stop24h 15m

$742

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Fri 11/6

9:50 pm-11:40 pm

1 stop19h 50m

Porto

Mon 11/23

1:45 pm-6:25 pm

1 stop34h 40m

$792

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 $805 to $1,023.
The lowest price recently found on this route was $625.

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 $564. 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 $610.

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 $824 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 $674 on momondo.

Can stopping save me money on Chicago to Porto flights?

You could potentially save up to 10% 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	$232
Fastest flight time	11h 20m
Direct flights	None

The best one-way flight to Porto from Chicago in the past 72 hours is $232. The best round-trip flight deal from Chicago to Porto found on momondo in the last 72 hours is $625.

The fastest flight from Chicago to Porto takes 11h 20m

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 20m.
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 September 2026, there are 7 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 71% of the total bookings. Other popular airlines include United Airlines with 20% and Iberia with 9%.

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 8,225 reviews	Search Lufthansa flights
United Airlines	PriceFrom $489	Free Cancellation	Rating 7.4 10,170 reviews	Search United Airlines flights
Iberia	PriceFrom $519	Free Cancellation	Rating 7.0 3,248 reviews	Search Iberia flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.1 12,049 reviews	Search American Airlines flights
KLM	PriceFrom $531	Free Cancellation	Rating 7.8 1,571 reviews	Search KLM flights
Turkish Airlines	PriceFrom $618	Free Cancellation	Rating 7.4 4,480 reviews	Search Turkish Airlines flights

Coimbra

Vila Nova de Gaia

Aveiro

Braga

Pinhao

Matosinhos

Esposende

Chaves

Arcos de Valdevez

Viseu

Espinho

Guimarães

Lamego

Ponte de Lima

Mesao Frio

Penafiel

Caminha

Baiao

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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Faro Airport

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Cheap flights from Chicago to Porto from $232

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 10/11. 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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TAP AIR PORTUGAL flights from Chicago to Porto

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

KLM flights from Chicago to Porto

Our best KLM 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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