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

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

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 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.

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 44% 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 airport is the most popular layover for flights between Chicago and Porto?

Lisbon (LIS) was the most common stop: 57% of momondo users choosing 1-stop flights on this route connected there.

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 travel time from Chicago to Porto?

Flights connecting via Lisbon (LIS) have the shortest average one-way travel time: 11h 59m.

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 layover airport offers the lowest fares from Chicago to Porto?

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

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 June 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.

$308 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 $898 to $1,150. The lowest price recently found on this route was $629.

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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.

7:15 pm - 11:05 am

ORD

OPO

33h 50m

1 stop

11:55 am - 4:45 pm

OPO

ORD

34h 50m

1 stop

$629Scandinavian Airlines

Mon, Nov 2 - Wed, Nov 11

7:15 pm - 11:05 am

ORD

OPO

33h 50m

1 stop

11:55 am - 4:45 pm

OPO

ORD

34h 50m

1 stop

$631Scandinavian Airlines

Mon, Nov 2 - Wed, Nov 11

8:15 pm - 11:05 am

ORD

OPO

33h 50m

1 stop

12:00 pm - 4:45 pm

OPO

ORD

34h 45m

1 stop

$667Scandinavian Airlines

Sat, Oct 31 - Sat, Nov 7

7:15 pm - 11:05 am

ORD

OPO

33h 50m

1 stop

11:55 am - 4:45 pm

OPO

ORD

34h 50m

1 stop

$690Scandinavian Airlines

Mon, Nov 2 - Wed, Nov 18

8:10 pm - 1:30 pm

ORD

OPO

11h 20m

1 stop

8:00 pm - 3:30 pm

OPO

ORD

25h 30m

1 stop

$691TAP AIR PORTUGAL

Sun, Nov 8 - Thu, Nov 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

$693TAP AIR PORTUGAL

Sun, Nov 8 - Thu, Nov 19

7:15 pm - 11:10 am

ORD

OPO

33h 55m

1 stop

5:50 pm - 4:45 pm

OPO

ORD

28h 55m

1 stop

$707Scandinavian Airlines

Thu, Nov 5 - Thu, Nov 19

6:00 pm - 11:50 pm

ORD

OPO

23h 50m

2 stops

2:00 pm - 2:45 pm

OPO

ORD

30h 45m

2 stops

$714Multiple Airlines

Sun, Aug 9 - Tue, Aug 25

1:00 pm - 9:05 am

MDW

OPO

14h 05m

2 stops

5:00 am - 4:50 pm

OPO

MDW

17h 50m

2 stops

$809Delta

Wed, Nov 4 - Wed, Nov 18

12:30 pm - 10:35 am

MDW

OPO

16h 05m

2 stops

5:00 am - 10:10 pm

OPO

MDW

23h 10m

2 stops

$859Delta

Wed, Nov 4 - Sat, Nov 14

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Delta flights from Chicago to Porto

Our best Delta deals on Chicago to Porto flight tickets

Delta

Nov 29

ORD1:35 pmChicago O'Hare Intl

15h 00m

2 stops

OPO10:35 amPorto

Dec 10

OPO5:00 amPorto

15h 25m

1 stop

ORD2:25 pmChicago O'Hare Intl

$765

Delta

Nov 29

ORD1:35 pmChicago O'Hare Intl

15h 00m

2 stops

OPO10:35 amPorto

Dec 8

OPO5:00 amPorto

19h 40m

2 stops

ORD6:40 pmChicago O'Hare Intl

$775

Delta

Nov 4

MDW1:00 pmChicago Midway

14h 05m

2 stops

OPO9:05 amPorto

Nov 18

OPO5:00 amPorto

17h 50m

2 stops

MDW4:50 pmChicago Midway

$809

Scandinavian Airlines flights from Chicago to Porto

Our best Scandinavian Airlines deals on Chicago to Porto flight tickets

Scandinavian Airlines

Nov 2

ORD7:15 pmChicago O'Hare Intl

33h 50m

1 stop

OPO11:05 amPorto

Nov 11

OPO11:55 amPorto

34h 50m

1 stop

ORD4:45 pmChicago O'Hare Intl

$631

Scandinavian Airlines

Nov 2

ORD7:15 pmChicago O'Hare Intl

33h 50m

1 stop

OPO11:05 amPorto

Nov 11

OPO11:55 amPorto

34h 50m

1 stop

ORD4:45 pmChicago O'Hare Intl

$637

Scandinavian Airlines

Oct 31

ORD8:15 pmChicago O'Hare Intl

33h 50m

1 stop

OPO11:05 amPorto

Nov 7

OPO12:00 pmPorto

34h 45m

1 stop

ORD4:45 pmChicago O'Hare Intl

$667

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/2

7:15 pm-11:05 am

1 stop33h 50m

Porto

Wed 11/11

11:55 am-4:45 pm

1 stop34h 50m

$629

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/2

7:15 pm-11:05 am

1 stop33h 50m

Porto

Wed 11/11

11:55 am-4:45 pm

1 stop34h 50m

$631

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 10/31

8:15 pm-11:05 am

1 stop33h 50m

Porto

Sat 11/7

12:00 pm-4:45 pm

1 stop34h 45m

$667

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/2

7:15 pm-11:05 am

1 stop33h 50m

Porto

Wed 11/18

11:55 am-4:45 pm

1 stop34h 50m

$690

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

$691

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

$693

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 11/5

7:15 pm-11:10 am

1 stop33h 55m

Porto

Thu 11/19

5:50 pm-4:45 pm

1 stop28h 55m

$707

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 8/9

6:00 pm-11:50 pm

2 stops23h 50m

Porto

Tue 8/25

2:00 pm-2:45 pm

2 stops30h 45m

$714

Quickest round-trip

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Wed 11/4

1:00 pm-9:05 am

2 stops14h 05m

Porto

Wed 11/18

5:00 am-4:50 pm

2 stops17h 50m

$809

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Wed 11/4

12:30 pm-10:35 am

2 stops16h 05m

Porto

Sat 11/14

5:00 am-10:10 pm

2 stops23h 10m

$859

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 $760 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 30% 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 48m
Direct flights	None

The fastest flight from Chicago to Porto takes 11h 48m

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 48m.
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 June 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 56% of the total bookings. Other popular airlines include United Airlines with 28%, Iberia with 9%, 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 2,290 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $474	Free Cancellation	Rating 6.8 8,086 reviews	Search Lufthansa flights
United Airlines	PriceFrom $497	Free Cancellation	Rating 7.4 9,868 reviews	Search United Airlines flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.1 11,725 reviews	Search American Airlines flights
KLM	PriceFrom $531	Free Cancellation	Rating 7.8 1,530 reviews	Search KLM flights
Iberia	PriceFrom $684	Free Cancellation	Rating 7.0 3,243 reviews	Search Iberia flights

Vila Nova de Gaia

Coimbra

Braga

Aveiro

Matosinhos

Lamego

Esposende

Chaves

Pinhao

Guimarães

Espinho

Arcos de Valdevez

Ponte de Lima

Viseu

Curia

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.

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Cheap flights from Chicago to Porto from $308

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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Delta 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

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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

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Why use momondo?

An easier way to manage your Porto trip

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List of cabin classes available on flights landing in Porto. Availability may vary depending on flight origin and airline.

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