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 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.

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 41% 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.

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.

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

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.

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.

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

Flights via Madrid (MAD) offer the lowest average round-trip price of $689.

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

Lisbon (LIS) was the most common stop: 43% of momondo users choosing 1-stop flights on this route connected there.

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.

$348 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 $852 to $624. The lowest price recently found on this route was $703.

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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.

8:10 pm - 3:45 pm

ORD

OPO

37h 35m

1 stop

10:45 am - 9:40 am

OPO

ORD

28h 55m

1 stop

$703Turkish Airlines

Wed, Sep 2 - Wed, Sep 9

8:10 pm - 9:45 am

ORD

OPO

31h 35m

1 stop

10:40 am - 9:40 am

OPO

ORD

29h 00m

1 stop

$705Turkish Airlines

Thu, Sep 17 - Fri, Oct 9

9:10 pm - 5:00 pm

ORD

OPO

14h 50m

1 stop

8:30 am - 3:30 pm

OPO

ORD

13h 00m

1 stop

$719TAP AIR PORTUGAL

Sun, Oct 25 - Sun, Nov 8

8:10 pm - 3:45 pm

ORD

OPO

37h 35m

1 stop

4:50 pm - 9:40 am

OPO

ORD

22h 50m

1 stop

$743Turkish Airlines

Wed, Sep 9 - Mon, Sep 14

8:10 pm - 9:40 am

ORD

OPO

31h 30m

1 stop

4:50 pm - 9:40 am

OPO

ORD

22h 50m

1 stop

$744Turkish Airlines

Wed, Sep 9 - Mon, Sep 14

6:00 pm - 7:00 pm

ORD

OPO

19h 00m

1 stop

10:30 pm - 2:45 pm

OPO

ORD

22h 15m

1 stop

$760TAP AIR PORTUGAL

Sun, Aug 16 - Tue, Aug 25

6:00 am - 9:05 am

ORD

OPO

21h 05m

1 stop

5:00 am - 2:30 pm

OPO

ORD

15h 30m

1 stop

$762Delta

Sun, Nov 1 - Fri, Nov 13

10:30 am - 11:35 pm

MDW

OPO

31h 05m

3 stops

8:25 am - 9:35 am

OPO

MDW

31h 10m

2 stops

$881Multiple Airlines

Sun, May 31 - Sun, Jun 7

9:30 am - 10:25 am

MDW

OPO

18h 55m

2 stops

5:00 am - 6:05 pm

OPO

MDW

19h 05m

2 stops

$910Delta

Sun, Aug 16 - Tue, Aug 25

3:20 pm - 6:45 am

MDW

OPO

33h 25m

2 stops

8:25 am - 9:40 am

OPO

MDW

31h 15m

2 stops

$917Multiple Airlines

Sun, Jun 14 - Sun, Jun 21

Turkish Airlines flights from Chicago to Porto

Our best Turkish Airlines deals on Chicago to Porto flight tickets

Turkish Airlines

Sep 2

ORD8:10 pmChicago O'Hare Intl

37h 35m

1 stop

OPO3:45 pmPorto

Sep 9

OPO10:45 amPorto

28h 55m

1 stop

ORD9:40 amChicago O'Hare Intl

$703

Turkish Airlines

Sep 17

ORD8:10 pmChicago O'Hare Intl

31h 35m

1 stop

OPO9:45 amPorto

Oct 9

OPO10:40 amPorto

29h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

$705

Turkish Airlines

Sep 9

ORD8:10 pmChicago O'Hare Intl

37h 35m

1 stop

OPO3:45 pmPorto

Sep 14

OPO4:50 pmPorto

22h 50m

1 stop

ORD9:40 amChicago O'Hare Intl

$743

TAP AIR PORTUGAL flights from Chicago to Porto

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

TAP AIR PORTUGAL

Oct 25

ORD9:10 pmChicago O'Hare Intl

14h 50m

1 stop

OPO5:00 pmPorto

Nov 8

OPO8:30 amPorto

13h 00m

1 stop

ORD3:30 pmChicago O'Hare Intl

$719

TAP AIR PORTUGAL

Aug 16

ORD6:00 pmChicago O'Hare Intl

19h 00m

1 stop

OPO7:00 pmPorto

Aug 25

OPO10:30 pmPorto

22h 15m

1 stop

ORD2:45 pmChicago O'Hare Intl

$760

TAP AIR PORTUGAL

Nov 1

ORD8:10 pmChicago O'Hare Intl

11h 20m

1 stop

OPO1:30 pmPorto

Nov 7

OPO8:00 pmPorto

25h 30m

1 stop

ORD3:30 pmChicago O'Hare Intl

$795

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 9/2

8:10 pm-3:45 pm

1 stop37h 35m

Porto

Wed 9/9

10:45 am-9:40 am

1 stop28h 55m

$703

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 9/17

8:10 pm-9:45 am

1 stop31h 35m

Porto

Fri 10/9

10:40 am-9:40 am

1 stop29h 00m

$705

Quickest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 10/25

9:10 pm-5:00 pm

1 stop14h 50m

Porto

Sun 11/8

8:30 am-3:30 pm

1 stop13h 00m

$719

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 9/9

8:10 pm-3:45 pm

1 stop37h 35m

Porto

Mon 9/14

4:50 pm-9:40 am

1 stop22h 50m

$743

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 9/9

8:10 pm-9:40 am

1 stop31h 30m

Porto

Mon 9/14

4:50 pm-9:40 am

1 stop22h 50m

$744

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 8/16

6:00 pm-7:00 pm

1 stop19h 00m

Porto

Tue 8/25

10:30 pm-2:45 pm

1 stop22h 15m

$760

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 11/1

6:00 am-9:05 am

1 stop21h 05m

Porto

Fri 11/13

5:00 am-2:30 pm

1 stop15h 30m

$762

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 5/31

10:30 am-11:35 pm

3 stops31h 05m

Porto

Sun 6/7

8:25 am-9:35 am

2 stops31h 10m

$881

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 8/16

9:30 am-10:25 am

2 stops18h 55m

Porto

Tue 8/25

5:00 am-6:05 pm

2 stops19h 05m

$910

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 6/14

3:20 pm-6:45 am

2 stops33h 25m

Porto

Sun 6/21

8:25 am-9:40 am

2 stops31h 15m

$917

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 $711 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 $578 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	11h 55m
Direct flights	None

The fastest flight from Chicago to Porto takes 11h 55m

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 55m.
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 36%, Iberia with 8%, and Lufthansa with 6%.

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 2,238 reviews	Search TAP AIR PORTUGAL flights
United Airlines	PriceFrom $497	Free Cancellation	Rating 7.4 9,684 reviews	Search United Airlines flights
Lufthansa	PriceFrom $507	Free Cancellation	Rating 6.8 7,974 reviews	Search Lufthansa flights
Iberia	PriceFrom $519	Free Cancellation	Rating 7.0 3,212 reviews	Search Iberia flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.1 11,667 reviews	Search American Airlines flights
KLM	PriceFrom $531	Free Cancellation	Rating 7.8 1,511 reviews	Search KLM flights

Vila Nova de Gaia

Coimbra

Braga

Aveiro

Matosinhos

Lamego

Esposende

Chaves

Pinhao

Guimarães

Espinho

Arcos de Valdevez

Ponte de Lima

Viseu

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 $348

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 10/5. 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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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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