$382 Find Cheap Flights from Portugal to Chicago O'Hare Airport - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Chicago departing on 9/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Portugal to Chicago

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portugal to Chicago that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portugal to Chicago

Thu, Sep 17 - Sat, Sep 26
Iberia Logo
8:25 am - 2:25 pm
LIS
-
ORD
12h 00m
1 stop
Iberia Logo
4:55 pm - 11:50 am
ORD
-
LIS
12h 55m
1 stop
$567Iberia
Wed, Oct 28 - Sun, Nov 15
Multiple Airlines Logo
6:30 am - 4:10 pm
LIS
-
ORD
14h 40m
1 stop
Multiple Airlines Logo
5:10 pm - 12:05 pm
ORD
-
LIS
12h 55m
1 stop
$570Multiple Airlines
Mon, Dec 14 - Wed, Jan 13
Multiple Airlines Logo
6:30 am - 2:55 pm
LIS
-
ORD
14h 25m
1 stop
Multiple Airlines Logo
6:50 pm - 2:50 pm
ORD
-
LIS
14h 00m
1 stop
$580Multiple Airlines
Fri, Oct 16 - Wed, Oct 21
Finnair Logo
6:35 am - 4:00 pm
LIS
-
ORD
15h 25m
1 stop
Finnair Logo
10:20 pm - 11:25 pm
ORD
-
LIS
19h 05m
1 stop
$581Finnair
Thu, Aug 20 - Tue, Aug 25
Aer Lingus Logo
11:45 am - 7:15 pm
FAO
-
ORD
13h 30m
1 stop
Aer Lingus Logo
9:00 pm - 7:25 pm
ORD
-
FAO
16h 25m
1 stop
$589Aer Lingus
Tue, Sep 1 - Tue, Sep 8
Aer Lingus Logo
11:45 am - 7:15 pm
FAO
-
ORD
13h 30m
1 stop
Aer Lingus Logo
3:45 pm - 10:35 am
ORD
-
FAO
12h 50m
1 stop
$590Aer Lingus
Sat, Sep 5 - Sun, Sep 13
American Airlines Logo
6:35 am - 2:25 pm
LIS
-
ORD
13h 50m
1 stop
American Airlines Logo
5:55 pm - 5:45 pm
ORD
-
LIS
17h 50m
1 stop
$590American Airlines
Fri, Nov 20 - Mon, Nov 23
American Airlines Logo
8:20 am - 2:55 pm
LIS
-
ORD
12h 35m
1 stop
American Airlines Logo
6:50 pm - 6:55 pm
ORD
-
LIS
18h 05m
1 stop
$594American Airlines
Mon, Aug 17 - Sun, Aug 23
British Airways Logo
11:10 am - 3:00 pm
FAO
-
ORD
33h 50m
1 stop
British Airways Logo
9:15 pm - 10:20 am
ORD
-
FAO
31h 05m
1 stop
$594British Airways
Fri, Aug 21 - Sat, Sep 5
British Airways Logo
11:05 am - 5:01 pm
LIS
-
ORD
11h 56m
1 stop
British Airways Logo
9:15 pm - 10:05 am
ORD
-
LIS
30h 50m
1 stop
$597British Airways
Booking Insights

KAYAK's insights & trends for flights to Chicago

Get data-powered insights and trends for flights to Chicago to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to Chicago O'Hare Airport?

These are the best round-trip prices found by users searching on KAYAK in the last 5 days.

In the last 5 days, the cheapest flight deal to Chicago O'Hare Airport was found on the route from Porto, at $567 return. The most popular connection is from Lisbon to Chicago O'Hare Airport and KAYAK users have found round-trip deals for as low as $567 in the last 5 days.

What is the cheapest day to fly to Chicago?

The average price of all round-trip flights to Chicago O'Hare Intl Airport clicked on KAYAK for each day over the last 12 months.

Based on KAYAK data, the cheapest day to fly to Chicago is Friday where round-trip tickets can be as cheap as $1,056. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $1,111 on average.

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights to Chicago O'Hare Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to Chicago O'Hare Intl Airport is February, where tickets cost $695 on average for return flights. On the other hand, the most expensive months are August and January, where the average cost of tickets from Portugal is $1,209 and $1,137 respectively. For one-way flights, the best month to travel is January with an average price of $587.

What is the cheapest time of day to fly to Chicago O'Hare Intl Airport?

The average price for all round-trip flights to Chicago O'Hare Intl Airport depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Chicago O'Hare Intl Airport is generally in the afternoon, when round-trip flights cost $933 on average. The most expensive time of day to fly to Chicago O'Hare Intl Airport is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,082.

What is a good deal for flights to Chicago O'Hare Intl Airport?

If you’re looking for cheap airfare to Chicago O'Hare Intl Airport, 25% of our users found tickets to Chicago O'Hare Intl Airport for the following prices or less: From Lisbon $983 round-trip.

Find deals

Good to know

Low season

November

Cheapest flight

$382
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 30% increase in price.
Flight from Porto to Chicago

FAQs - booking Chicago O'Hare Airport flights

  • What is the cheapest flight to Chicago O'Hare Airport?

    In the last 5 days, the cheapest flight deal to Chicago O'Hare Airport was found on the route from Porto, at $567 return. The most popular connection is from Lisbon to Chicago O'Hare Airport and KAYAK users have found round-trip deals for as low as $567 in the last 5 days.

  • How far is Chicago O'Hare Intl Airport from central Chicago?

    You’ll need to travel 16 miles to reach the Chicago city center from Chicago O'Hare Intl Airport.

  • How much is a flight to Chicago?

    On average, a flight to Chicago costs $987. The cheapest price found on KAYAK in the last 2 weeks cost $599 and departed from Lisbon Humberto Delgado Airport.

  • How does KAYAK find such low prices on flights to Chicago O'Hare Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Chicago O'Hare Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Chicago O'Hare Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Chicago O'Hare Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chicago O'Hare Airport with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Chicago O'Hare Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chicago O'Hare Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many direct flights to Chicago O'Hare Intl Airport are there each week?

    Each week there are around 28,376 direct flights from within Portugal to Chicago O'Hare Intl Airport. The most common day for departures is Sunday, with 15% of flights taking off on this day.

Top tips for finding cheap flights to Chicago O'Hare Airport

  • Looking for cheap airfare to Chicago O'Hare Airport? 25% of our users found round-trip tickets to Chicago O'Hare Airport for the following prices or less: From Lisbon $1,625
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Chicago O'Hare Airport flight deals.

Everything you need to know for your flight to Chicago

Information on the airport you'll fly into in Chicago

Chicago O'Hare Airport (ORD)