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?

United Airlines, KLM, and Delta are the most popular carriers operating from Chicago to Porto

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 47% 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 layover airport offers the lowest fares from Chicago to Porto?

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

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.

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.

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.

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

Flights connecting via Madrid (MAD) have the shortest average one-way travel time: 11h 50m.

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.

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 July 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.

$263 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 $817 to $1,170. The lowest price recently found on this route was $611.

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.

7:45 pm - 3:00 pm

ORD

OPO

13h 15m

1 stop

9:15 pm - 12:40 pm

OPO

ORD

21h 25m

1 stop

$611TAP AIR PORTUGAL

Thu, Aug 6 - Wed, Aug 19

8:10 pm - 1:30 pm

ORD

OPO

11h 20m

1 stop

8:00 pm - 3:30 pm

OPO

ORD

25h 30m

1 stop

$613TAP AIR PORTUGAL

Sun, Nov 8 - Thu, Nov 19

6:00 pm - 3:00 pm

ORD

OPO

15h 00m

1 stop

5:05 am - 4:00 pm

OPO

ORD

16h 55m

1 stop

$614TAP AIR PORTUGAL

Wed, Sep 23 - Wed, Oct 7

7:45 pm - 3:00 pm

ORD

OPO

13h 15m

1 stop

6:00 pm - 12:40 pm

OPO

ORD

24h 40m

1 stop

$615TAP AIR PORTUGAL

Thu, Aug 6 - Wed, Aug 19

6:00 pm - 11:00 pm

ORD

OPO

23h 00m

1 stop

9:00 am - 4:00 pm

OPO

ORD

13h 00m

1 stop

$621TAP AIR PORTUGAL

Sun, Aug 23 - Sun, Aug 30

6:00 pm - 11:00 pm

ORD

OPO

23h 00m

1 stop

9:00 am - 4:00 pm

OPO

ORD

13h 00m

1 stop

$624TAP AIR PORTUGAL

Sun, Aug 23 - Sun, Aug 30

7:25 pm - 3:30 pm

MDW

OPO

14h 05m

2 stops

5:00 am - 4:50 pm

OPO

MDW

17h 50m

2 stops

$899Delta

Sun, Aug 30 - Wed, Dec 9

10:20 am - 11:45 am

MDW

OPO

19h 25m

1 stop

6:05 am - 9:45 am

OPO

MDW

33h 40m

2 stops

$938Multiple Airlines

Sun, Aug 9 - Wed, Aug 12

10:54 am - 8:30 am

MDW

OPO

15h 36m

2 stops

5:00 am - 6:01 pm

OPO

MDW

19h 01m

2 stops

$964Delta

Wed, Aug 19 - Wed, Aug 26

1:25 pm - 10:40 am

MDW

OPO

15h 15m

2 stops

5:00 am - 6:01 pm

OPO

MDW

19h 01m

2 stops

$969Delta

Wed, Aug 19 - Wed, Aug 26

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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

Aug 6

ORD7:45 pmChicago O'Hare Intl

13h 15m

1 stop

OPO3:00 pmPorto

Aug 19

OPO9:15 pmPorto

21h 25m

1 stop

ORD12:40 pmChicago O'Hare Intl

$611

TAP AIR PORTUGAL

Nov 8

ORD8:10 pmChicago O'Hare Intl

11h 20m

1 stop

OPO1:30 pmPorto

Nov 19

OPO8:00 pmPorto

25h 30m

1 stop

ORD3:30 pmChicago O'Hare Intl

$613

TAP AIR PORTUGAL

Sep 23

ORD6:00 pmChicago O'Hare Intl

15h 00m

1 stop

OPO3:00 pmPorto

Oct 7

OPO5:05 amPorto

16h 55m

1 stop

ORD4:00 pmChicago O'Hare Intl

$614

KLM flights from Chicago to Porto

Our best KLM deals on Chicago to Porto flight tickets

KLM

Aug 6

MDW6:42 pmChicago Midway

14h 48m

2 stops

OPO3:30 pmPorto

Aug 19

OPO5:55 amPorto

16h 20m

2 stops

MDW4:15 pmChicago Midway

$1,027

KLM

Aug 7

MDW7:25 pmChicago Midway

14h 05m

2 stops

OPO3:30 pmPorto

Aug 13

OPO5:55 amPorto

16h 20m

2 stops

MDW4:15 pmChicago Midway

$1,096

KLM

Aug 6

MDW6:42 pmChicago Midway

14h 48m

2 stops

OPO3:30 pmPorto

Aug 19

OPO5:55 amPorto

16h 20m

2 stops

MDW4:15 pmChicago Midway

$1,132

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 8/6

7:45 pm-3:00 pm

1 stop13h 15m

Porto

Wed 8/19

9:15 pm-12:40 pm

1 stop21h 25m

$611

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 11/8

8:10 pm-1:30 pm

1 stop11h 20m

Porto

Thu 11/19

8:00 pm-3:30 pm

1 stop25h 30m

$613

Quickest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 9/23

6:00 pm-3:00 pm

1 stop15h 00m

Porto

Wed 10/7

5:05 am-4:00 pm

1 stop16h 55m

$614

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 8/6

7:45 pm-3:00 pm

1 stop13h 15m

Porto

Wed 8/19

6:00 pm-12:40 pm

1 stop24h 40m

$615

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 8/23

6:00 pm-11:00 pm

1 stop23h 00m

Porto

Sun 8/30

9:00 am-4:00 pm

1 stop13h 00m

$621

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 8/23

6:00 pm-11:00 pm

1 stop23h 00m

Porto

Sun 8/30

9:00 am-4:00 pm

1 stop13h 00m

$624

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 8/30

7:25 pm-3:30 pm

2 stops14h 05m

Porto

Wed 12/9

5:00 am-4:50 pm

2 stops17h 50m

$899

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 8/9

10:20 am-11:45 am

1 stop19h 25m

Porto

Wed 8/12

6:05 am-9:45 am

2 stops33h 40m

$938

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Wed 8/19

10:54 am-8:30 am

2 stops15h 36m

Porto

Wed 8/26

5:00 am-6:01 pm

2 stops19h 01m

$964

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Wed 8/19

1:25 pm-10:40 am

2 stops15h 15m

Porto

Wed 8/26

5:00 am-6:01 pm

2 stops19h 01m

$969

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 $800 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 $557 on momondo.

Can stopping save me money on Chicago to Porto flights?

You could potentially save up to 9% 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	11h 20m
Direct flights	None

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.

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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 July 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 55% of the total bookings. Other popular airlines include United Airlines with 28%, Iberia with 10%, and Lufthansa with 8%.

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 2,336 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $474	Free Cancellation	Rating 6.8 8,130 reviews	Search Lufthansa flights
United Airlines	PriceFrom $489	Free Cancellation	Rating 7.4 9,980 reviews	Search United Airlines flights
Iberia	PriceFrom $519	Free Cancellation	Rating 7.0 3,252 reviews	Search Iberia flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.1 11,804 reviews	Search American Airlines flights
KLM	PriceFrom $531	Free Cancellation	Rating 7.8 1,537 reviews	Search KLM flights
Turkish Airlines	PriceFrom $618	Free Cancellation	Rating 7.4 4,442 reviews	Search Turkish Airlines flights

Vila Nova de Gaia

Coimbra

Braga

Aveiro

Matosinhos

Lamego

Esposende

Chaves

Pinhao

Arcos de Valdevez

Guimarães

Viseu

Espinho

Ponte de Lima

Mesao Frio

Penafiel

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.

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Cheap flights from Chicago to Porto from $263

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 8/30. 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?

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

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