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Cheap flights from Illinois to Porto from $264

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Porto departing on 4/17. 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 Illinois to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
6:00 pm - 11:00 am
ORD
-
OPO
11h 00m
1 stop
TAP AIR PORTUGAL Logo
10:00 am - 4:00 pm
OPO
-
ORD
12h 00m
1 stop
$552TAP AIR PORTUGAL
Wed, Apr 22 - Wed, Apr 29
Scandinavian Airlines Logo
7:15 pm - 5:40 pm
ORD
-
OPO
16h 25m
1 stop
Scandinavian Airlines Logo
5:55 pm - 4:10 pm
OPO
-
ORD
28h 15m
1 stop
$572Scandinavian Airlines
Sat, Apr 18 - Fri, May 1
Turkish Airlines Logo
8:10 pm - 9:45 am
ORD
-
OPO
31h 35m
1 stop
Turkish Airlines Logo
4:50 pm - 9:40 am
OPO
-
ORD
22h 50m
1 stop
$578Turkish Airlines
Mon, Apr 13 - Tue, Apr 21
Multiple Airlines Logo
7:15 pm - 11:50 pm
ORD
-
OPO
22h 35m
2 stops
Multiple Airlines Logo
1:00 pm - 4:10 pm
OPO
-
ORD
33h 10m
2 stops
$582Multiple Airlines
Mon, Apr 13 - Tue, Apr 21
Turkish Airlines Logo
11:25 am - 3:45 pm
ORD
-
OPO
22h 20m
1 stop
Turkish Airlines Logo
4:40 pm - 9:40 am
OPO
-
ORD
23h 00m
1 stop
$587Turkish Airlines
Thu, Sep 3 - Wed, Sep 16
Multiple Airlines Logo
7:15 pm - 11:50 pm
ORD
-
OPO
22h 35m
2 stops
Multiple Airlines Logo
11:00 am - 4:10 pm
OPO
-
ORD
35h 10m
3 stops
$591Multiple Airlines
Mon, Apr 13 - Tue, Apr 21
Delta Logo
6:34 pm - 3:30 pm
MDW
-
OPO
14h 56m
2 stops
Delta Logo
5:00 am - 6:36 pm
OPO
-
MDW
19h 36m
2 stops
$714Delta
Wed, Apr 8 - Wed, Apr 15
Delta Logo
7:16 pm - 5:55 pm
MDW
-
OPO
16h 39m
2 stops
Delta Logo
5:00 am - 5:58 pm
OPO
-
MDW
18h 58m
2 stops
$764Delta
Mon, Apr 27 - Mon, May 4
Iberia Logo
8:03 pm - 7:40 am
STL
-
OPO
53h 37m
2 stops
Iberia Logo
8:40 pm - 7:33 pm
OPO
-
STL
28h 53m
2 stops
$793Iberia
Sat, Apr 25 - Sat, May 2
Iberia Logo
12:27 pm - 11:45 am
STL
-
OPO
17h 18m
2 stops
Iberia Logo
8:40 pm - 7:33 pm
OPO
-
STL
28h 53m
2 stops
$822Iberia
Thu, May 7 - Tue, May 12

Delta flights from Illinois to Porto

Our best Delta deals on Illinois to Porto flight tickets
Delta
Apr 13
ORD5:04 pmChicago O'Hare Intl
16h 21m
2 stops
OPO3:25 pmPorto
Apr 19
OPO5:00 amPorto
15h 15m
1 stop
ORD2:15 pmChicago O'Hare Intl
$699
Delta
Apr 19
ORD1:36 pmChicago O'Hare Intl
19h 49m
2 stops
OPO3:25 pmPorto
May 5
OPO5:00 amPorto
15h 15m
1 stop
ORD2:15 pmChicago O'Hare Intl
$700
Delta
Apr 8
ORD7:14 pmChicago O'Hare Intl
17h 06m
2 stops
OPO6:20 pmPorto
Apr 15
OPO5:00 amPorto
15h 30m
1 stop
ORD2:30 pmChicago O'Hare Intl
$704

Scandinavian Airlines flights from Illinois to Porto

Our best Scandinavian Airlines deals on Illinois to Porto flight tickets
Scandinavian Airlines
Apr 18
ORD7:15 pmChicago O'Hare Intl
16h 25m
1 stop
OPO5:40 pmPorto
May 1
OPO5:55 pmPorto
28h 15m
1 stop
ORD4:10 pmChicago O'Hare Intl
$572
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
$596
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
$620

momondo Fare Finder

 
Customize your flight search to find flights from Illinois 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 March 14, 2026.
Use the filters below to find and compare flights from Illinois to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 4/22

6:00 pm-11:00 am

1 stop11h 00m

Porto

Wed 4/29

10:00 am-4:00 pm

1 stop12h 00m

$552

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 4/18

7:15 pm-5:40 pm

1 stop16h 25m

Porto

Fri 5/1

5:55 pm-4:10 pm

1 stop28h 15m

$572

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 4/13

8:10 pm-9:45 am

1 stop31h 35m

Porto

Tue 4/21

4:50 pm-9:40 am

1 stop22h 50m

$578

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 4/13

7:15 pm-11:50 pm

2 stops22h 35m

Porto

Tue 4/21

1:00 pm-4:10 pm

2 stops33h 10m

$582

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 9/3

11:25 am-3:45 pm

1 stop22h 20m

Porto

Wed 9/16

4:40 pm-9:40 am

1 stop23h 00m

$587

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 4/13

7:15 pm-11:50 pm

2 stops22h 35m

Porto

Tue 4/21

11:00 am-4:10 pm

3 stops35h 10m

$591

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Wed 4/8

6:34 pm-3:30 pm

2 stops14h 56m

Porto

Wed 4/15

5:00 am-6:36 pm

2 stops19h 36m

$714

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Mon 4/27

7:16 pm-5:55 pm

2 stops16h 39m

Porto

Mon 5/4

5:00 am-5:58 pm

2 stops18h 58m

$764

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Sat 4/25

8:03 pm-7:40 am

2 stops53h 37m

Porto

Sat 5/2

8:40 pm-7:33 pm

2 stops28h 53m

$793

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Thu 5/7

12:27 pm-11:45 am

2 stops17h 18m

Porto

Tue 5/12

8:40 pm-7:33 pm

2 stops28h 53m

$822

Flights are sorted by cheapest round-trip flights first.

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

How to get the cheapest flight ticket from Illinois 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

How far in advance should I book a flight to Porto?

You are more likely to see cheaper flights to Porto from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $693 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Illinois for as low as $479 on momondo.

Can stopping save me money on Illinois to Porto flights?

You could potentially save up to 6% on your flight if you consider stops on a Illinois to Porto flight.

Cheap Illinois to Porto flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Porto

Fastest flight time

10h 55m

Direct flights

None
The fastest flight from Illinois to Porto takes 10h 55m
There are no direct flights from Illinois to Porto. There are no popular flight routes from Illinois to Porto.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Porto Airport?

    Prices for flights from Illinois to Porto Airport refresh daily.

  • How many operators does momondo search for flights from Illinois to Porto Airport?

  • How old do you have to be to fly from Illinois to Porto Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois 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.

Best airlines flying from Illinois to Porto

Compare and see reviews for airlines that fly from Illinois to Porto with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom $450Free CancellationRating
7.1
2,166 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $497Free CancellationRating
7.0
3,134 reviews
Search Iberia flights
LufthansaPriceFrom $507Free CancellationRating
6.8
7,848 reviews
Search Lufthansa flights
American AirlinesPriceFrom $524Free CancellationRating
7.1
11,465 reviews
Search American Airlines flights
KLMPriceFrom $531Free CancellationRating
7.8
1,471 reviews
Search KLM flights
United AirlinesPriceFrom $552Free CancellationRating
7.4
9,422 reviews
Search United Airlines flights
British AirwaysPriceFrom $563Free CancellationRating
6.7
7,786 reviews
Search British Airways flights
DeltaPriceFrom $638Free CancellationRating
7.9
8,291 reviews
Search Delta 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
Chaves
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Viseu
Ponte de Lima
Curia
Penafiel
Mesao Frio
Mira
Baiao

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Porto?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Porto for you.

Can I find flights from Illinois to Porto with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Porto from Illinois with this policy.

How can momondo help me find flights from Illinois to Porto?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Porto from Illinois.

I’m not ready to book a flight from Illinois to Porto right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Illinois to Porto now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Porto and let you know when they change.

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