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

Flights via Madrid (MAD) offer the lowest average round-trip price of $724.

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.

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.

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

Lisbon (LIS) was the most common stop: 47% of momondo users choosing 1-stop flights on this route connected there.

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 43% 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.

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?

KLM and Delta 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 Newark (EWR) have the shortest average one-way travel time: 10h 29m.

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.

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.

$333 Cheap Flights from Chicago to Porto in 2026

Q: 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 $969 to $718. The lowest price recently found on this route was $576.

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Find the cheapest flights from Chicago to Porto

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One-way

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7:15 pm - 11:05 am

ORD

OPO

33h 50m

1 stop

12:00 pm - 4:45 pm

OPO

ORD

34h 45m

1 stop

$576Scandinavian Airlines

Sat, Nov 14 - Sat, Nov 21

7:15 pm - 5:00 pm

ORD

OPO

15h 45m

1 stop

11:55 am - 4:45 pm

OPO

ORD

34h 50m

1 stop

$598Scandinavian Airlines

Wed, Nov 11 - Mon, Nov 23

7:15 pm - 11:10 am

ORD

OPO

33h 55m

1 stop

11:55 am - 4:45 pm

OPO

ORD

34h 50m

1 stop

$614Scandinavian Airlines

Thu, Nov 12 - Mon, Nov 23

7:15 pm - 11:05 am

ORD

OPO

33h 50m

1 stop

12:00 pm - 4:45 pm

OPO

ORD

34h 45m

1 stop

$638Scandinavian Airlines

Mon, Nov 2 - Sat, Nov 14

7:15 pm - 11:10 am

ORD

OPO

33h 55m

1 stop

12:00 pm - 4:45 pm

OPO

ORD

34h 45m

1 stop

$661Scandinavian Airlines

Thu, Nov 12 - Sat, Nov 21

7:15 pm - 11:05 am

ORD

OPO

33h 50m

1 stop

12:00 pm - 4:45 pm

OPO

ORD

34h 45m

1 stop

$668Scandinavian Airlines

Sat, Nov 14 - Sat, Nov 21

9:30 am - 9:05 am

MDW

OPO

17h 35m

2 stops

5:00 am - 4:50 pm

OPO

MDW

17h 50m

2 stops

$826Delta

Sun, Nov 1 - Sat, Nov 7

1:05 pm - 9:05 am

MDW

OPO

14h 00m

2 stops

11:00 am - 9:45 pm

OPO

MDW

16h 45m

2 stops

$833Multiple Airlines

Sun, Nov 1 - Mon, Nov 16

6:45 pm - 3:25 pm

MDW

OPO

15h 40m

2 stops

5:00 am - 6:37 pm

OPO

MDW

19h 37m

2 stops

$881Delta

Sat, Oct 31 - Sat, Nov 14

9:30 am - 10:30 am

MDW

OPO

19h 00m

2 stops

11:00 am - 9:45 pm

OPO

MDW

16h 45m

2 stops

$888Delta

Sat, Nov 14 - Sat, Nov 21

TAP AIR PORTUGAL flights from Chicago to Porto

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

TAP AIR PORTUGAL

Nov 4

ORD7:00 pmChicago O'Hare Intl

12h 30m

1 stop

OPO1:30 pmPorto

Nov 11

OPO8:30 amPorto

13h 00m

1 stop

ORD3:30 pmChicago O'Hare Intl

$709

TAP AIR PORTUGAL

Oct 25

ORD9:10 pmChicago O'Hare Intl

11h 20m

1 stop

OPO1:30 pmPorto

Nov 5

OPO8:00 pmPorto

25h 30m

1 stop

ORD3:30 pmChicago O'Hare Intl

$714

TAP AIR PORTUGAL

Nov 1

ORD8:10 pmChicago O'Hare Intl

12h 50m

1 stop

OPO3:00 pmPorto

Nov 7

OPO6:00 pmPorto

27h 30m

1 stop

ORD3:30 pmChicago O'Hare Intl

$726

Turkish Airlines flights from Chicago to Porto

Our best Turkish Airlines deals on Chicago to Porto flight tickets

Turkish Airlines

Sep 17

ORD8:10 pmChicago O'Hare Intl

31h 35m

1 stop

OPO9:45 amPorto

Sep 22

OPO4:50 pmPorto

22h 50m

1 stop

ORD9:40 amChicago O'Hare Intl

$736

Turkish Airlines

Oct 6

ORD11:25 amChicago O'Hare Intl

22h 15m

1 stop

OPO3:40 pmPorto

Oct 22

OPO4:40 pmPorto

23h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

$753

Turkish Airlines

Oct 4

ORD8:10 pmChicago O'Hare Intl

31h 30m

1 stop

OPO9:40 amPorto

Oct 23

OPO4:45 pmPorto

22h 55m

1 stop

ORD9:40 amChicago O'Hare Intl

$761

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 11/14

7:15 pm-11:05 am

1 stop33h 50m

Porto

Sat 11/21

12:00 pm-4:45 pm

1 stop34h 45m

$576

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/11

7:15 pm-5:00 pm

1 stop15h 45m

Porto

Mon 11/23

11:55 am-4:45 pm

1 stop34h 50m

$598

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 11/12

7:15 pm-11:10 am

1 stop33h 55m

Porto

Mon 11/23

11:55 am-4:45 pm

1 stop34h 50m

$614

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/2

7:15 pm-11:05 am

1 stop33h 50m

Porto

Sat 11/14

12:00 pm-4:45 pm

1 stop34h 45m

$638

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 11/12

7:15 pm-11:10 am

1 stop33h 55m

Porto

Sat 11/21

12:00 pm-4:45 pm

1 stop34h 45m

$661

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 11/14

7:15 pm-11:05 am

1 stop33h 50m

Porto

Sat 11/21

12:00 pm-4:45 pm

1 stop34h 45m

$668

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 11/1

9:30 am-9:05 am

2 stops17h 35m

Porto

Sat 11/7

5:00 am-4:50 pm

2 stops17h 50m

$826

Quickest round-trip

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 11/1

1:05 pm-9:05 am

2 stops14h 00m

Porto

Mon 11/16

11:00 am-9:45 pm

2 stops16h 45m

$833

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sat 10/31

6:45 pm-3:25 pm

2 stops15h 40m

Porto

Sat 11/14

5:00 am-6:37 pm

2 stops19h 37m

$881

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sat 11/14

9:30 am-10:30 am

2 stops19h 00m

Porto

Sat 11/21

11:00 am-9:45 pm

2 stops16h 45m

$888

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 $731 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	12h 50m
Direct flights	None

The fastest flight from Chicago to Porto takes 12h 50m

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 50m.
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 35%, Iberia with 8%, and Lufthansa with 7%.

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 2,257 reviews	Search TAP AIR PORTUGAL flights
United Airlines	PriceFrom $497	Free Cancellation	Rating 7.4 9,745 reviews	Search United Airlines flights
Lufthansa	PriceFrom $507	Free Cancellation	Rating 6.8 8,016 reviews	Search Lufthansa flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.1 11,644 reviews	Search American Airlines flights
KLM	PriceFrom $531	Free Cancellation	Rating 7.8 1,518 reviews	Search KLM flights
Iberia	PriceFrom $584	Free Cancellation	Rating 7.0 3,220 reviews	Search Iberia flights

Vila Nova de Gaia

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.

An easier way to manage your Porto trip

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Cheap flights from Chicago to Porto from $333

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 10/20. 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

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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

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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