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Cheap flights from Chicago to Porto from $220

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 1/12. 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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Find the cheapest flights from Chicago to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
7:10 pm - 3:05 pmORD-OPO
13h 55m1 stop
TAP AIR PORTUGAL Logo
5:00 am - 2:45 pmOPO-ORD
15h 45m1 stop
$427TAP AIR PORTUGAL
Find Deal
Wed, Dec 3 - Sun, Dec 14
TAP AIR PORTUGAL Logo
7:10 pm - 3:05 pmORD-OPO
13h 55m1 stop
TAP AIR PORTUGAL Logo
6:55 am - 2:45 pmOPO-ORD
13h 50m1 stop
$428TAP AIR PORTUGAL
Find Deal
Wed, Dec 3 - Sun, Dec 14
TAP AIR PORTUGAL Logo
7:10 pm - 10:00 pmORD-OPO
20h 50m1 stop
TAP AIR PORTUGAL Logo
6:55 am - 2:45 pmOPO-ORD
13h 50m1 stop
$437TAP AIR PORTUGAL
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Wed, Dec 10 - Sun, Dec 14
Multiple Airlines Logo
12:50 pm - 1:15 pmORD-OPO
18h 25m2 stops
Multiple Airlines Logo
7:20 pm - 4:20 pmOPO-ORD
27h 00m1 stop
$457Multiple Airlines
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Wed, Dec 3 - Mon, Dec 8
Lufthansa Logo
10:35 pm - 10:25 pmORD-OPO
17h 50m1 stop
Lufthansa Logo
1:45 pm - 6:25 pmOPO-ORD
34h 40m1 stop
$458Lufthansa
Find Deal
Wed, Dec 3 - Mon, Dec 8
Multiple Airlines Logo
12:50 pm - 1:15 pmORD-OPO
18h 25m2 stops
Multiple Airlines Logo
7:20 pm - 11:18 amOPO-ORD
45h 58m2 stops
$459Multiple Airlines
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Wed, Dec 3 - Mon, Dec 8
SWISS Logo
6:50 pm - 11:10 amORD-OPO
34h 20m1 stop
SWISS Logo
12:10 pm - 12:45 pmOPO-ORD
30h 35m1 stop
$463SWISS
Find Deal
Wed, Jan 28 - Wed, Feb 4
SWISS Logo
5:10 pm - 11:15 amORD-OPO
13h 05m1 stop
SWISS Logo
8:40 am - 3:55 pmOPO-ORD
13h 15m1 stop
$464SWISS
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Tue, Mar 17 - Tue, Mar 31
Delta Logo
1:14 pm - 10:30 amMDW-OPO
15h 16m2 stops
Delta Logo
6:30 am - 6:18 pmOPO-MDW
17h 48m2 stops
$623Delta
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Wed, Dec 3 - Mon, Dec 8
Delta Logo
1:05 pm - 10:30 amMDW-OPO
16h 25m2 stops
Delta Logo
5:00 am - 6:34 pmOPO-MDW
19h 34m2 stops
$652Delta
Find Deal
Tue, Mar 17 - Tue, Mar 31

TAP AIR PORTUGAL flights from Chicago to Porto

Our best TAP AIR PORTUGAL deals on Chicago to Porto flight tickets
TAP AIR PORTUGAL
Dec 3
ORD7:10 pmChicago O'Hare Intl
13h 55m
1 stop
OPO3:05 pmPorto
Dec 14
OPO5:00 amPorto
15h 45m
1 stop
ORD2:45 pmChicago O'Hare Intl
$427
Find similar
TAP AIR PORTUGAL
Dec 3
ORD7:10 pmChicago O'Hare Intl
13h 55m
1 stop
OPO3:05 pmPorto
Dec 14
OPO6:55 amPorto
13h 50m
1 stop
ORD2:45 pmChicago O'Hare Intl
$428
Find similar
TAP AIR PORTUGAL
Dec 10
ORD7:10 pmChicago O'Hare Intl
20h 50m
1 stop
OPO10:00 pmPorto
Dec 14
OPO6:55 amPorto
13h 50m
1 stop
ORD2:45 pmChicago O'Hare Intl
$437
Find similar

Lufthansa flights from Chicago to Porto

Our best Lufthansa deals on Chicago to Porto flight tickets
Lufthansa
Jan 13
ORD6:00 pmChicago O'Hare Intl
12h 50m
1 stop
OPO12:50 pmPorto
Jan 20
OPO6:00 amPorto
13h 10m
1 stop
ORD1:10 pmChicago O'Hare Intl
$433
Find similar
Lufthansa
Dec 3
ORD10:35 pmChicago O'Hare Intl
17h 50m
1 stop
OPO10:25 pmPorto
Dec 8
OPO1:45 pmPorto
34h 40m
1 stop
ORD6:25 pmChicago O'Hare Intl
$458
Find similar
Lufthansa
Mar 12
ORD5:20 pmChicago O'Hare Intl
13h 20m
1 stop
OPO11:40 amPorto
Mar 19
OPO12:30 pmPorto
13h 35m
1 stop
ORD9:05 pmChicago O'Hare Intl
$512
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 20, 2025.
Use the filters below to find and compare flights from Chicago to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 12/3

7:10 pm-3:05 pm

1 stop13h 55m

Porto

Sun 12/14

5:00 am-2:45 pm

1 stop15h 45m

$427

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 12/3

7:10 pm-3:05 pm

1 stop13h 55m

Porto

Sun 12/14

6:55 am-2:45 pm

1 stop13h 50m

$428

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 12/10

7:10 pm-10:00 pm

1 stop20h 50m

Porto

Sun 12/14

6:55 am-2:45 pm

1 stop13h 50m

$437

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 12/3

12:50 pm-1:15 pm

2 stops18h 25m

Porto

Mon 12/8

7:20 pm-4:20 pm

1 stop27h 00m

$457

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 12/3

10:35 pm-10:25 pm

1 stop17h 50m

Porto

Mon 12/8

1:45 pm-6:25 pm

1 stop34h 40m

$458

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 12/3

12:50 pm-1:15 pm

2 stops18h 25m

Porto

Mon 12/8

7:20 pm-11:18 am

2 stops45h 58m

$459

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 1/28

6:50 pm-11:10 am

1 stop34h 20m

Porto

Wed 2/4

12:10 pm-12:45 pm

1 stop30h 35m

$463

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 3/17

5:10 pm-11:15 am

1 stop13h 05m

Porto

Tue 3/31

8:40 am-3:55 pm

1 stop13h 15m

$464

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Wed 12/3

1:14 pm-10:30 am

2 stops15h 16m

Porto

Mon 12/8

6:30 am-6:18 pm

2 stops17h 48m

$623

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Tue 3/17

1:05 pm-10:30 am

2 stops16h 25m

Porto

Tue 3/31

5:00 am-6:34 pm

2 stops19h 34m

$652

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Porto from

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

What is the cheapest month to fly to Porto?

The month of April is, on average, the cheapest month to fly to Porto from Chicago, with most prices found around $616. If you aren’t able to travel during the month of April, then book flights to Porto from Chicago during February instead. Flights to Porto in February, while not as cheap as those in April, still average around $628.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Monday when prices can be found for as low as $708. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $808. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

In the evening is the cheapest time of day to fly from Chicago to Porto when you can find flight prices for as low as $611. Flying to Porto in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,018 on average. Flights to Porto from Chicago at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight 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 $676 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 $622 on momondo.

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

Direct flights

None
There are no direct flights from Chicago to Porto. There are no popular flight routes from Chicago to Porto.
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  • 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 00m.

  • 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?

  • 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?

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 PORTUGALPriceFrom $468Free CancellationRating
7.1
2,070 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $487Free CancellationRating
7.0
3,027 reviews
Search Iberia flights
British AirwaysPriceFrom $504Free CancellationRating
6.7
7,533 reviews
Search British Airways flights
LufthansaPriceFrom $526Free CancellationRating
6.8
7,579 reviews
Search Lufthansa flights
KLMPriceFrom $531Free CancellationRating
7.7
1,414 reviews
Search KLM flights
United AirlinesPriceFrom $545Free CancellationRating
7.4
9,028 reviews
Search United Airlines flights
American AirlinesPriceFrom $554Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights
SWISSPriceFrom $558Free CancellationRating
7.5
1,788 reviews
Search SWISS flights
DeltaPriceFrom $638Free CancellationRating
7.9
8,002 reviews
Search Delta flights
Air CanadaPriceFrom $646Free CancellationRating
7.1
10,463 reviews
Search Air Canada flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Aveiro
Matosinhos
Braga
Lamego
Guimarães
Esposende
Chaves
Espinho
Viseu
Ponte de Lima
Arcos de Valdevez
Pinhao
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.

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