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Cheap flights from Illinois to Portugal from $258

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 9/27. 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 Illinois to Portugal

Cheap round-trip flights

Scandinavian Airlines Logo
11:10 pm - 4:05 pmORD-LIS
35h 55m1 stop
Scandinavian Airlines Logo
4:55 pm - 4:45 pmLIS-ORD
29h 50m1 stop
$381Scandinavian Airlines
Find Deal
Wed, Oct 29 - Fri, Nov 14
Scandinavian Airlines Logo
7:20 pm - 4:05 pmORD-LIS
14h 45m1 stop
Scandinavian Airlines Logo
4:55 pm - 4:45 pmLIS-ORD
29h 50m1 stop
$399Scandinavian Airlines
Find Deal
Thu, Nov 6 - Sun, Nov 9
Icelandair Logo
6:30 pm - 8:20 pmORD-LIS
19h 50m1 stop
Icelandair Logo
9:20 pm - 5:20 pmLIS-ORD
26h 00m1 stop
$447Icelandair
Find Deal
Sat, Jan 10 - Thu, Jan 15
Icelandair Logo
6:30 pm - 8:20 pmORD-LIS
19h 50m1 stop
Icelandair Logo
9:20 pm - 5:20 pmLIS-ORD
26h 00m1 stop
$448Icelandair
Find Deal
Sat, Jan 10 - Thu, Jan 15
Logo
7:10 pm - 4:05 pmORD-LIS
14h 55m1 stop
Logo
7:05 am - 4:45 pmLIS-ORD
15h 40m1 stop
$464
Find Deal
Sun, Jan 18 - Sat, Jan 24
Logo
7:10 pm - 4:05 pmORD-LIS
14h 55m1 stop
Logo
7:05 am - 4:45 pmLIS-ORD
15h 40m1 stop
$465
Find Deal
Sun, Jan 18 - Sat, Jan 24
TAP AIR PORTUGAL Logo
9:25 pm - 10:20 amORD-LIS
7h 55mnonstop
TAP AIR PORTUGAL Logo
11:25 am - 3:00 pmLIS-ORD
9h 35mnonstop
$471TAP AIR PORTUGAL
Find Deal
Sun, Oct 26 - Wed, Nov 5
TAP AIR PORTUGAL Logo
8:25 pm - 10:20 amORD-LIS
7h 55mnonstop
TAP AIR PORTUGAL Logo
11:25 am - 3:00 pmLIS-ORD
9h 35mnonstop
$472TAP AIR PORTUGAL
Find Deal
Sun, Feb 1 - Sun, Feb 15
SWISS Logo
6:50 pm - 2:35 pmORD-LIS
13h 45m1 stop
SWISS Logo
3:25 pm - 4:20 pmLIS-ORD
30h 55m1 stop
$483SWISS
Find Deal
Mon, Nov 3 - Wed, Nov 12
SWISS Logo
6:50 pm - 2:35 pmORD-LIS
13h 45m1 stop
SWISS Logo
3:25 pm - 4:20 pmLIS-ORD
30h 55m1 stop
$511SWISS
Find Deal
Tue, Nov 4 - Mon, Nov 17

Delta flights from Illinois to Portugal

Our best Delta deals on Illinois to Portugal flight tickets
Delta
Dec 2
MDW10:35 amChicago Midway
16h 25m
2 stops
LIS9:00 amLisbon Humberto Delgado
Dec 9
LIS10:00 amLisbon Humberto Delgado
17h 44m
2 stops
MDW9:44 pmChicago Midway
$619
Find similar
Delta
Dec 3
STL4:27 pmLambert-St Louis
10h 13m
1 stop
LIS8:40 amLisbon Humberto Delgado
Dec 7
LIS10:00 amLisbon Humberto Delgado
19h 39m
2 stops
STL11:39 pmLambert-St Louis
$627
Find similar
Delta
Aug 26
ORD2:00 pmChicago O'Hare Intl
19h 30m
2 stops
OPO3:30 pmPorto
Sep 5
OPO9:20 amPorto
19h 17m
2 stops
ORD10:37 pmChicago O'Hare Intl
$739
Find similar

United Airlines flights from Illinois to Portugal

Our best United Airlines deals on Illinois to Portugal flight tickets
United Airlines
Oct 22
ORD10:40 amChicago O'Hare Intl
16h 40m
1 stop
LIS9:20 amLisbon Humberto Delgado
Nov 4
LIS5:00 amLisbon Humberto Delgado
14h 10m
1 stop
ORD1:10 pmChicago O'Hare Intl
$484
Find similar
United Airlines
Nov 3
ORD2:30 pmChicago O'Hare Intl
11h 40m
1 stop
LIS8:10 amLisbon Humberto Delgado
Nov 12
LIS5:00 amLisbon Humberto Delgado
21h 05m
1 stop
ORD8:05 pmChicago O'Hare Intl
$489
Find similar
United Airlines
Nov 3
ORD12:45 pmChicago O'Hare Intl
13h 25m
2 stops
LIS8:10 amLisbon Humberto Delgado
Nov 19
LIS5:00 amLisbon Humberto Delgado
14h 10m
1 stop
ORD1:10 pmChicago O'Hare Intl
$493
Find similar

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 August 16, 2025.
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

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 10/29

11:10 pm-4:05 pm

1 stop35h 55m

Lisbon Humberto Delgado

Fri 11/14

4:55 pm-4:45 pm

1 stop29h 50m

$381

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Thu 11/6

7:20 pm-4:05 pm

1 stop14h 45m

Lisbon Humberto Delgado

Sun 11/9

4:55 pm-4:45 pm

1 stop29h 50m

$399

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Sat 1/10

6:30 pm-8:20 pm

1 stop19h 50m

Lisbon Humberto Delgado

Thu 1/15

9:20 pm-5:20 pm

1 stop26h 00m

$447

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Sat 1/10

6:30 pm-8:20 pm

1 stop19h 50m

Lisbon Humberto Delgado

Thu 1/15

9:20 pm-5:20 pm

1 stop26h 00m

$448

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Sun 1/18

7:10 pm-4:05 pm

1 stop14h 55m

Lisbon Humberto Delgado

Sat 1/24

7:05 am-4:45 pm

1 stop15h 40m

$464

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Sun 1/18

7:10 pm-4:05 pm

1 stop14h 55m

Lisbon Humberto Delgado

Sat 1/24

7:05 am-4:45 pm

1 stop15h 40m

$465

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Sun 10/26

9:25 pm-10:20 am

Nonstop7h 55m

Lisbon Humberto Delgado

Wed 11/5

11:25 am-3:00 pm

Nonstop9h 35m

$471

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Sun 2/1

8:25 pm-10:20 am

Nonstop7h 55m

Lisbon Humberto Delgado

Sun 2/15

11:25 am-3:00 pm

Nonstop9h 35m

$472

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Mon 11/3

6:50 pm-2:35 pm

1 stop13h 45m

Lisbon Humberto Delgado

Wed 11/12

3:25 pm-4:20 pm

1 stop30h 55m

$483

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Tue 11/4

6:50 pm-2:35 pm

1 stop13h 45m

Lisbon Humberto Delgado

Mon 11/17

3:25 pm-4:20 pm

1 stop30h 55m

$511

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 February. Flight prices, which tend to average around $558, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Portugal from Illinois during January instead. Flights to Portugal in January, while not as cheap as those in February, still average around $588.

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 $590. 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 Saturday, with ticket prices averaging around $823.

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 $551. In the afternoon is when there is more demand to fly to Portugal, so prices are often more expensive at around $814 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 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 $752 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 $731 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 22% 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

$258

Fastest flight time

7h 55m

Direct flights

Mon, Tue, Thu, Sat and Sun

Airports in Portugal

5 airports
The best one-way flight to Portugal from Illinois in the past 72 hours is $258. The best round-trip flight deal from Illinois to Portugal found on momondo in the last 72 hours is $381.
The fastest flight from Illinois to Portugal takes 7h 55m
Direct flights go from Illinois to Portugal on Monday, Tuesday, Thursday, Saturday and Sunday. Airlines offering direct flights are: TAP AIR PORTUGAL and JetBlue.
There are 5 airports near Portugal: Faro (FAO), Lisbon Humberto Delgado (LIS), Ponta Delgada Nordela (PDL), Funchal Madeira (FNC), Porto (OPO)
Search flight deals

  • 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
Scandinavian AirlinesPriceFrom $411Free CancellationRating
7.4
1,469 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $444Free CancellationRating
7.0
527 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $453Free CancellationRating
7.1
1,951 reviews
Search TAP AIR PORTUGAL flights
FinnairPriceFrom $463Free CancellationRating
7.6
1,321 reviews
Search Finnair flights
IberiaPriceFrom $474Free CancellationRating
7.0
2,884 reviews
Search Iberia flights
Virgin AtlanticPriceFrom $490Free CancellationRating
7.4
657 reviews
Search Virgin Atlantic flights
Aer LingusPriceFrom $494Free CancellationRating
7.1
1,215 reviews
Search Aer Lingus flights
British AirwaysPriceFrom $504Free CancellationRating
6.6
7,267 reviews
Search British Airways flights
American AirlinesPriceFrom $511Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SWISSPriceFrom $517Free CancellationRating
7.6
1,697 reviews
Search SWISS 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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Flights to Velasfrom $594