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Cheap flights from Chicago to Porto from $269

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 3/10. 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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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 - 5:00 pm
ORD
-
OPO
17h 00m
1 stop
TAP AIR PORTUGAL Logo
5:05 am - 4:15 pm
OPO
-
ORD
17h 10m
1 stop
$372TAP AIR PORTUGAL
Sun, May 3 - Sat, May 16
TAP AIR PORTUGAL Logo
6:00 pm - 11:10 pm
ORD
-
OPO
23h 10m
1 stop
TAP AIR PORTUGAL Logo
10:00 am - 4:00 pm
OPO
-
ORD
12h 00m
1 stop
$379TAP AIR PORTUGAL
Wed, Apr 29 - Wed, May 6
TAP AIR PORTUGAL Logo
6:00 pm - 12:40 am
ORD
-
OPO
24h 40m
1 stop
TAP AIR PORTUGAL Logo
7:00 am - 4:15 pm
OPO
-
ORD
15h 15m
1 stop
$384TAP AIR PORTUGAL
Sun, Apr 19 - Sat, Apr 25
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
Delta Logo
10:49 am - 10:30 am
MDW
-
OPO
17h 41m
2 stops
Delta Logo
5:00 am - 5:54 pm
OPO
-
MDW
17h 54m
2 stops
$598Delta
Wed, Mar 4 - Tue, Mar 10
Multiple Airlines Logo
7:30 am - 4:10 pm
MDW
-
OPO
26h 40m
2 stops
Multiple Airlines Logo
9:50 am - 10:05 am
OPO
-
MDW
30h 15m
1 stop
$697Multiple Airlines
Tue, Apr 14 - Sat, Apr 18
Multiple Airlines Logo
7:30 am - 4:10 pm
MDW
-
OPO
26h 40m
2 stops
Multiple Airlines Logo
9:50 am - 10:05 am
OPO
-
MDW
30h 15m
1 stop
$724Multiple Airlines
Tue, Apr 14 - Sat, Apr 18
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
KLM Logo
6:40 pm - 3:25 pm
MDW
-
OPO
14h 45m
2 stops
KLM Logo
5:00 am - 5:37 pm
OPO
-
MDW
18h 37m
2 stops
$959KLM
Fri, Feb 27 - Tue, Mar 3

TAP AIR PORTUGAL flights from Chicago to Porto

Our best TAP AIR PORTUGAL deals on Chicago to Porto flight tickets
TAP AIR PORTUGAL
May 3
ORD6:00 pmChicago O'Hare Intl
17h 00m
1 stop
OPO5:00 pmPorto
May 16
OPO5:05 amPorto
17h 10m
1 stop
ORD4:15 pmChicago O'Hare Intl
$372
TAP AIR PORTUGAL
Apr 29
ORD6:00 pmChicago O'Hare Intl
23h 10m
1 stop
OPO11:10 pmPorto
May 6
OPO10:00 amPorto
12h 00m
1 stop
ORD4:00 pmChicago O'Hare Intl
$379
TAP AIR PORTUGAL
Apr 19
ORD6:00 pmChicago O'Hare Intl
24h 40m
1 stop
OPO12:40 amPorto
Apr 25
OPO7:00 amPorto
15h 15m
1 stop
ORD4:15 pmChicago O'Hare Intl
$384

Lufthansa flights from Chicago to Porto

Our best Lufthansa deals on Chicago to Porto flight tickets
Lufthansa
Apr 28
ORD9:40 pmChicago O'Hare Intl
19h 45m
1 stop
OPO11:25 pmPorto
May 6
OPO6:00 amPorto
12h 55m
1 stop
ORD12:55 pmChicago O'Hare Intl
$526
Lufthansa
Apr 28
ORD9:40 pmChicago O'Hare Intl
19h 45m
1 stop
OPO11:25 pmPorto
May 7
OPO6:00 amPorto
12h 55m
1 stop
ORD12:55 pmChicago O'Hare Intl
$542
Lufthansa
Apr 27
ORD3:35 pmChicago O'Hare Intl
12h 45m
1 stop
OPO10:20 amPorto
May 5
OPO6:00 amPorto
12h 55m
1 stop
ORD12:55 pmChicago O'Hare Intl
$544

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 29, 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 5/3

6:00 pm-5:00 pm

1 stop17h 00m

Porto

Sat 5/16

5:05 am-4:15 pm

1 stop17h 10m

$372

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 4/29

6:00 pm-11:10 pm

1 stop23h 10m

Porto

Wed 5/6

10:00 am-4:00 pm

1 stop12h 00m

$379

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 4/19

6:00 pm-12:40 am

1 stop24h 40m

Porto

Sat 4/25

7:00 am-4:15 pm

1 stop15h 15m

$384

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

MDW - OPO

MDWOPO

Chicago Midway

Wed 3/4

10:49 am-10:30 am

2 stops17h 41m

Porto

Tue 3/10

5:00 am-5:54 pm

2 stops17h 54m

$598

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Tue 4/14

7:30 am-4:10 pm

2 stops26h 40m

Porto

Sat 4/18

9:50 am-10:05 am

1 stop30h 15m

$697

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Tue 4/14

7:30 am-4:10 pm

2 stops26h 40m

Porto

Sat 4/18

9:50 am-10:05 am

1 stop30h 15m

$724

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

Fri 2/27

6:40 pm-3:25 pm

2 stops14h 45m

Porto

Tue 3/3

5:00 am-5:37 pm

2 stops18h 37m

$959

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 typical price of a round-trip flight between Chicago and Porto?

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 55m

Direct flights

None
The fastest flight from Chicago to Porto takes 10h 55m
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 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?

  • 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
7,705 reviews
Search British Airways flights
LufthansaPriceFrom $507Free CancellationRating
6.8
7,754 reviews
Search Lufthansa flights
KLMPriceFrom $531Free CancellationRating
7.7
1,443 reviews
Search KLM flights
United AirlinesPriceFrom $549Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
American AirlinesPriceFrom $553Free CancellationRating
7.2
11,205 reviews
Search American Airlines flights
SWISSPriceFrom $558Free CancellationRating
7.6
1,864 reviews
Search SWISS flights
DeltaPriceFrom $638Free CancellationRating
7.9
8,128 reviews
Search Delta flights
Air CanadaPriceFrom $646Free CancellationRating
7.1
10,667 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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