Cheap flights from Portugal to Chicago from $370

The month of June is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Portugal averaging around $741.

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Friday when prices can be found for as low as $983. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Portugal because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,111.

Flying to Chicago O'Hare Intl Airport from Portugal at noon is the least expensive time of day to depart. momondo users have found prices as low as $933 when looking at flights departing at noon. Try not to purchase tickets in the morning because they tend to be around $1,045. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

There are 2 cabin classes available to choose from on Portugal to Chicago O'Hare Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 15% on your flight if you consider stops on a Portugal to Chicago O'Hare Intl Airport flight.

Historically, on average around 24% of flights between Portugal and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 131 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

Monday is statistically the day of the week which experiences the fewest number of delays on this flight route. Saturday has historically seen more delays on average compared to the rest of the week.

According to our data, TAP AIR PORTUGAL have had the least number of delays on this route over the last 12 months; with about 24% of their flights experiencing any sort of delay.

As of August 2026, there are 6 flights per week flying from Portugal to Chicago O'Hare Intl Airport. The most common day of the week flights depart is Fri, with 33% of flights taking off on this day.

On average, it takes 9h 20m to fly from Portugal to Chicago O'Hare Intl Airport if you fly out of Lisbon (the most popular airport in Portugal) and into Chicago O'Hare Intl Airport (the most popular airport in Chicago O'Hare Intl Airport). If you’re flying out of Porto and into Chicago O'Hare Intl Airport, then the flight time is around 12h 04m.