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Cheap flights from Illinois to Portugal from $201

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 Portugal departing on 12/6. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
7:50 pm - 11:00 pm
ORD
-
OPO
21h 10m
1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 12:40 pm
OPO
-
ORD
20h 10m
1 stop
$620TAP AIR PORTUGAL
Thu, Aug 13 - Wed, Aug 26
TAP AIR PORTUGAL Logo
6:00 pm - 8:35 pm
ORD
-
OPO
20h 35m
1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 4:00 pm
OPO
-
ORD
23h 30m
1 stop
$621TAP AIR PORTUGAL
Sun, Sep 20 - Tue, Oct 6
Multiple Airlines Logo
6:00 pm - 11:50 pm
ORD
-
OPO
23h 50m
2 stops
Multiple Airlines Logo
7:10 am - 12:40 pm
OPO
-
ORD
35h 30m
2 stops
$642Multiple Airlines
Wed, Sep 23 - Wed, Sep 30
Multiple Airlines Logo
6:00 pm - 11:05 pm
ORD
-
OPO
23h 05m
2 stops
Multiple Airlines Logo
12:55 pm - 4:00 pm
OPO
-
ORD
33h 05m
2 stops
$680Multiple Airlines
Sun, Sep 20 - Tue, Oct 6
JetBlue Logo
8:10 pm - 6:35 pm
ORD
-
PDL
17h 25m
1 stop
JetBlue Logo
9:30 am - 3:30 pm
PDL
-
ORD
35h 00m
1 stop
$686JetBlue
Sun, Jan 10 - Sat, Jan 16
Lufthansa Logo
9:50 pm - 11:30 pm
ORD
-
LIS
19h 40m
1 stop
Lufthansa Logo
5:00 am - 1:10 pm
LIS
-
ORD
14h 10m
1 stop
$709Lufthansa
Tue, Jan 12 - Tue, Jan 19
Icelandair Logo
6:30 pm - 12:50 pm
ORD
-
LIS
12h 20m
1 stop
Icelandair Logo
2:00 pm - 5:20 pm
LIS
-
ORD
33h 20m
1 stop
$710Icelandair
Sat, Nov 21 - Thu, Nov 26
Iberia Logo
12:06 pm - 7:40 am
ORD
-
LIS
13h 34m
2 stops
Iberia Logo
6:30 am - 3:10 pm
LIS
-
ORD
14h 40m
1 stop
$714Iberia
Wed, Nov 11 - Wed, Nov 18
Icelandair Logo
6:30 pm - 12:50 pm
ORD
-
LIS
12h 20m
1 stop
Icelandair Logo
2:00 pm - 5:20 pm
LIS
-
ORD
33h 20m
1 stop
$715Icelandair
Wed, Nov 4 - Sun, Nov 15
Lufthansa Logo
9:50 pm - 11:30 pm
ORD
-
LIS
19h 40m
1 stop
Lufthansa Logo
5:00 am - 6:59 pm
LIS
-
ORD
19h 59m
2 stops
$746Lufthansa
Tue, Nov 3 - Fri, Nov 13

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Air Canada flights from Illinois to Portugal

Our best Air Canada deals on Illinois to Portugal flight tickets
Air Canada
Nov 25
ORD7:25 amChicago O'Hare Intl
17h 30m
2 stops
LIS6:55 amLisbon Humberto Delgado
Dec 4
LIS11:20 amLisbon Humberto Delgado
31h 51m
2 stops
ORD1:11 pmChicago O'Hare Intl
$743
Air Canada
Nov 22
ORD8:50 pmChicago O'Hare Intl
30h 30m
1 stop
LIS9:20 amLisbon Humberto Delgado
Dec 4
LIS11:20 amLisbon Humberto Delgado
33h 32m
1 stop
ORD2:52 pmChicago O'Hare Intl
$748
Air Canada
Oct 14
ORD2:00 pmChicago O'Hare Intl
13h 20m
2 stops
LIS9:20 amLisbon Humberto Delgado
Oct 21
LIS5:05 amLisbon Humberto Delgado
21h 01m
2 stops
ORD8:06 pmChicago O'Hare Intl
$759

TAP AIR PORTUGAL flights from Illinois to Portugal

Our best TAP AIR PORTUGAL deals on Illinois to Portugal flight tickets
TAP AIR PORTUGAL
Aug 13
ORD7:50 pmChicago O'Hare Intl
21h 10m
1 stop
OPO11:00 pmPorto
Aug 26
OPO10:30 pmPorto
20h 10m
1 stop
ORD12:40 pmChicago O'Hare Intl
$620
TAP AIR PORTUGAL
Sep 20
ORD6:00 pmChicago O'Hare Intl
20h 35m
1 stop
OPO8:35 pmPorto
Oct 6
OPO10:30 pmPorto
23h 30m
1 stop
ORD4:00 pmChicago O'Hare Intl
$621
TAP AIR PORTUGAL
Sep 20
ORD6:00 pmChicago O'Hare Intl
20h 35m
1 stop
OPO8:35 pmPorto
Oct 6
OPO10:30 pmPorto
23h 30m
1 stop
ORD4:00 pmChicago O'Hare Intl
$622

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Portugal 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 July 30, 2026.
Use the filters below to find and compare flights from Illinois to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 8/13

7:50 pm-11:00 pm

1 stop21h 10m

Porto

Wed 8/26

10:30 pm-12:40 pm

1 stop20h 10m

$620

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 9/20

6:00 pm-8:35 pm

1 stop20h 35m

Porto

Tue 10/6

10:30 pm-4:00 pm

1 stop23h 30m

$621

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 9/23

6:00 pm-11:50 pm

2 stops23h 50m

Porto

Wed 9/30

7:10 am-12:40 pm

2 stops35h 30m

$642

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 9/20

6:00 pm-11:05 pm

2 stops23h 05m

Porto

Tue 10/6

12:55 pm-4:00 pm

2 stops33h 05m

$680

ChicagoPonta Delgada

ORD - PDL

ORDPDL

Chicago O'Hare Intl

Sun 1/10

8:10 pm-6:35 pm

1 stop17h 25m

Ponta Delgada Nordela

Sat 1/16

9:30 am-3:30 pm

1 stop35h 00m

$686

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Tue 1/12

9:50 pm-11:30 pm

1 stop19h 40m

Lisbon Humberto Delgado

Tue 1/19

5:00 am-1:10 pm

1 stop14h 10m

$709

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Sat 11/21

6:30 pm-12:50 pm

1 stop12h 20m

Lisbon Humberto Delgado

Thu 11/26

2:00 pm-5:20 pm

1 stop33h 20m

$710
Quickest round-trip

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 11/11

12:06 pm-7:40 am

2 stops13h 34m

Lisbon Humberto Delgado

Wed 11/18

6:30 am-3:10 pm

1 stop14h 40m

$714

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 11/4

6:30 pm-12:50 pm

1 stop12h 20m

Lisbon Humberto Delgado

Sun 11/15

2:00 pm-5:20 pm

1 stop33h 20m

$715

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Tue 11/3

9:50 pm-11:30 pm

1 stop19h 40m

Lisbon Humberto Delgado

Fri 11/13

5:00 am-6:59 pm

2 stops19h 59m

$746

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 Portugal from

How to get the cheapest flight ticket from Illinois to Portugal

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 Portugal?

The cheapest month to fly to Portugal from Illinois is in January. Flight prices, which tend to average around $578, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Portugal from Illinois during February instead. Flights to Portugal in February, while not as cheap as those in January, still average around $591.

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

According to our data, Wednesday is the cheapest day to fly to Portugal from Illinois. The lowest ticket price found for a Wednesday departure recently was $656. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Thursday, with ticket prices averaging around $854.

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

Our most recent data shows that the best time of day to fly to Portugal is in the evening. Flights from Illinois to Portugal during this time can be as low as $621. In the afternoon is when there is more demand to fly to Portugal, so prices are often more expensive at around $818 per ticket.

What is the cheapest Illinois to Portugal flight route?

Fly from Chicago O'Hare Intl to Lisbon Humberto Delgado for the best Illinois - Portugal flight prices

How far in advance should I book a flight from Illinois to Portugal?

You are more likely to see cheaper flights to Portugal from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $832 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Illinois for as low as $772 on momondo.

What cabin class options are available on Illinois to Portugal flights?

There are 3 cabin classes available to choose from on Illinois to Portugal flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to Portugal flights?

You could potentially save up to 55% on your flight if you consider stops on a Illinois to Portugal flight.

Cheap Illinois to Portugal flight deals and tips

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

Best Price Found

$447

Fastest flight time

8h 05m

Direct flights

Mon, Thu, Fri, Sat and Sun

Airports in Portugal

99 airports
The best one-way flight to Portugal from Illinois in the past 72 hours is $447. The best round-trip flight deal from Illinois to Portugal found on momondo in the last 72 hours is $653.
The fastest flight from Illinois to Portugal takes 8h 05m
Direct flights go from Illinois to Portugal on Monday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
There are 99 airports in Portugal. From Illinois there are direct flights to Lisbon Humberto Delgado (LIS).
Search flight deals

Frequently asked questions about flying from Illinois to Portugal

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

    Prices for flights from Illinois to Portugal are updated daily.

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

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

    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 Illinois to Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The required travel and health documents for your Portugal trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portugal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Illinois to Portugal?

Best airlines flying from Illinois to Portugal

Compare and see reviews for airlines that fly from Illinois to Portugal with momondo
Airline
Rating
Free Cancellation
Price
Virgin AtlanticPriceFrom $334Free CancellationRating
7.5
694 reviews
Search Virgin Atlantic flights
Scandinavian AirlinesPriceFrom $369Free CancellationRating
7.4
1,906 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $373Free CancellationRating
7.0
716 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $451Free CancellationRating
7.2
2,352 reviews
Search TAP AIR PORTUGAL flights
Air FrancePriceFrom $470Free CancellationRating
7.5
1,629 reviews
Search Air France flights
LufthansaPriceFrom $474Free CancellationRating
6.8
8,165 reviews
Search Lufthansa flights
United AirlinesPriceFrom $489Free CancellationRating
7.4
10,046 reviews
Search United Airlines flights
SWISSPriceFrom $489Free CancellationRating
7.5
2,019 reviews
Search SWISS flights
KLMPriceFrom $492Free CancellationRating
7.8
1,551 reviews
Search KLM flights
DeltaPriceFrom $494Free CancellationRating
7.8
8,487 reviews
Search Delta flights

Why use momondo?

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

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 Portugal for you.

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

Flights from Illinois to Portugal with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential Illinois to Portugal flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Portugal, momondo offers a useful price alert feature which will track prices for flights to Portugal from Illinois and alert you when they change.

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Find better results for your trip to Portugal

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Popular flights according to clicks in the last 7 days on momondo
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