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Cheap flights from Chicago to Porto from $250

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 3/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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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
6:00 pm - 8:25 pm
ORD
-
OPO
20h 25m
1 stop
TAP AIR PORTUGAL Logo
6:05 pm - 4:00 pm
OPO
-
ORD
27h 55m
1 stop
$371TAP AIR PORTUGAL
Sun, Apr 26 - Thu, May 7
TAP AIR PORTUGAL Logo
6:00 pm - 10:55 am
ORD
-
OPO
10h 55m
1 stop
TAP AIR PORTUGAL Logo
9:00 am - 4:00 pm
OPO
-
ORD
13h 00m
1 stop
$372TAP AIR PORTUGAL
Sun, May 3 - Sun, May 10
TAP AIR PORTUGAL Logo
6:15 pm - 4:10 pm
ORD
-
OPO
15h 55m
1 stop
TAP AIR PORTUGAL Logo
10:00 am - 4:00 pm
OPO
-
ORD
12h 00m
1 stop
$388TAP AIR PORTUGAL
Sat, Apr 11 - Fri, Apr 17
TAP AIR PORTUGAL Logo
6:00 pm - 11:00 am
ORD
-
OPO
11h 00m
1 stop
TAP AIR PORTUGAL Logo
9:15 pm - 4:00 pm
OPO
-
ORD
24h 45m
1 stop
$389TAP AIR PORTUGAL
Wed, Apr 29 - Tue, May 5
TAP AIR PORTUGAL Logo
6:00 pm - 3:00 pm
ORD
-
OPO
15h 00m
1 stop
TAP AIR PORTUGAL Logo
9:00 am - 4:00 pm
OPO
-
ORD
13h 00m
1 stop
$390TAP AIR PORTUGAL
Wed, Apr 15 - Fri, May 1
TAP AIR PORTUGAL Logo
6:00 pm - 5:00 pm
ORD
-
OPO
17h 00m
1 stop
TAP AIR PORTUGAL Logo
5:05 am - 4:00 pm
OPO
-
ORD
16h 55m
1 stop
$399TAP AIR PORTUGAL
Sun, Apr 26 - Sun, May 3
Multiple Airlines Logo
1:26 pm - 10:30 am
MDW
-
OPO
15h 04m
2 stops
Multiple Airlines Logo
5:00 am - 5:45 pm
OPO
-
MDW
18h 45m
2 stops
$591Multiple Airlines
Tue, Feb 24 - Tue, Mar 3
Delta Logo
1:10 pm - 10:30 am
MDW
-
OPO
16h 20m
2 stops
Delta Logo
5:00 am - 5:54 pm
OPO
-
MDW
17h 54m
2 stops
$617Delta
Tue, Mar 10 - Tue, Mar 17
Delta Logo
12:47 pm - 10:30 am
MDW
-
OPO
16h 43m
2 stops
Delta Logo
5:00 am - 5:54 pm
OPO
-
MDW
17h 54m
2 stops
$847Delta
Wed, Mar 11 - Wed, Mar 18
Delta Logo
5:21 pm - 3:15 pm
MDW
-
OPO
15h 54m
2 stops
Delta Logo
5:00 am - 6:31 pm
OPO
-
MDW
19h 31m
2 stops
$917Delta
Tue, May 5 - Fri, May 15

TAP AIR PORTUGAL flights from Chicago to Porto

Our best TAP AIR PORTUGAL deals on Chicago to Porto flight tickets
TAP AIR PORTUGAL
Apr 26
ORD6:00 pmChicago O'Hare Intl
19h 00m
1 stop
OPO7:00 pmPorto
May 7
OPO9:15 pmPorto
24h 45m
1 stop
ORD4:00 pmChicago O'Hare Intl
$371
TAP AIR PORTUGAL
Apr 29
ORD6:00 pmChicago O'Hare Intl
11h 00m
1 stop
OPO11:00 amPorto
May 6
OPO9:00 amPorto
13h 00m
1 stop
ORD4:00 pmChicago O'Hare Intl
$372
TAP AIR PORTUGAL
Feb 1
ORD8:25 pmChicago O'Hare Intl
15h 40m
1 stop
OPO6:05 pmPorto
Feb 14
OPO8:00 pmPorto
24h 45m
1 stop
ORD2:45 pmChicago O'Hare Intl
$378

Scandinavian Airlines flights from Chicago to Porto

Our best Scandinavian Airlines deals on Chicago to Porto flight tickets
Scandinavian Airlines
Apr 27
ORD7:15 pmChicago O'Hare Intl
33h 45m
1 stop
OPO11:00 amPorto
May 7
OPO11:50 amPorto
34h 20m
1 stop
ORD4:10 pmChicago O'Hare Intl
$510
Scandinavian Airlines
Apr 13
ORD7:15 pmChicago O'Hare Intl
33h 45m
1 stop
OPO11:00 amPorto
Apr 17
OPO5:55 pmPorto
28h 15m
1 stop
ORD4:10 pmChicago O'Hare Intl
$540
Scandinavian Airlines
Apr 27
ORD7:15 pmChicago O'Hare Intl
33h 45m
1 stop
OPO11:00 amPorto
May 8
OPO5:55 pmPorto
28h 15m
1 stop
ORD4:10 pmChicago O'Hare Intl
$543

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 January 27, 2026.
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

Sun 4/26

6:00 pm-8:25 pm

1 stop20h 25m

Porto

Thu 5/7

6:05 pm-4:00 pm

1 stop27h 55m

$371

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 5/3

6:00 pm-10:55 am

1 stop10h 55m

Porto

Sun 5/10

9:00 am-4:00 pm

1 stop13h 00m

$372

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 4/11

6:15 pm-4:10 pm

1 stop15h 55m

Porto

Fri 4/17

10:00 am-4:00 pm

1 stop12h 00m

$388

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 4/29

6:00 pm-11:00 am

1 stop11h 00m

Porto

Tue 5/5

9:15 pm-4:00 pm

1 stop24h 45m

$389

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 4/15

6:00 pm-3:00 pm

1 stop15h 00m

Porto

Fri 5/1

9:00 am-4:00 pm

1 stop13h 00m

$390

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 4/26

6:00 pm-5:00 pm

1 stop17h 00m

Porto

Sun 5/3

5:05 am-4:00 pm

1 stop16h 55m

$399

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Tue 2/24

1:26 pm-10:30 am

2 stops15h 04m

Porto

Tue 3/3

5:00 am-5:45 pm

2 stops18h 45m

$591

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Tue 3/10

1:10 pm-10:30 am

2 stops16h 20m

Porto

Tue 3/17

5:00 am-5:54 pm

2 stops17h 54m

$617

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Wed 3/11

12:47 pm-10:30 am

2 stops16h 43m

Porto

Wed 3/18

5:00 am-5:54 pm

2 stops17h 54m

$847

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Tue 5/5

5:21 pm-3:15 pm

2 stops15h 54m

Porto

Fri 5/15

5:00 am-6:31 pm

2 stops19h 31m

$917

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 March instead. Flights to Porto in March, while not as cheap as those in April, still average around $652.

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 $674 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 $613 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

Fastest flight time

10h 35m

Direct flights

None
The fastest flight from Chicago to Porto takes 10h 35m
There are no direct flights from Chicago to Porto. There are no popular flight routes from Chicago to Porto.
Search flight deals

  • 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 10h 35m.

  • 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 $462Free CancellationRating
7.1
2,130 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $487Free CancellationRating
7.0
3,099 reviews
Search Iberia flights
British AirwaysPriceFrom $504Free CancellationRating
6.7
7,704 reviews
Search British Airways flights
LufthansaPriceFrom $507Free CancellationRating
6.8
7,749 reviews
Search Lufthansa flights
KLMPriceFrom $531Free CancellationRating
7.7
1,443 reviews
Search KLM flights
United AirlinesPriceFrom $549Free CancellationRating
7.4
9,209 reviews
Search United Airlines flights
American AirlinesPriceFrom $553Free CancellationRating
7.2
11,201 reviews
Search American Airlines flights
SWISSPriceFrom $558Free CancellationRating
7.6
1,863 reviews
Search SWISS flights
DeltaPriceFrom $638Free CancellationRating
7.9
8,124 reviews
Search Delta flights
Air CanadaPriceFrom $646Free CancellationRating
7.1
10,666 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
Braga
Aveiro
Matosinhos
Esposende
Lamego
Guimarães
Espinho
Chaves
Pinhao
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.

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