Cheap flights from Portugal to Chicago from $366

The month of February is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Portugal averaging around $695.

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Wednesday when prices can be found for as low as $948. This is often the case because there is less demand to fly during this day of the week. On the other hand, Thursday 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 $1,083.

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.

Historically, on average around 22% 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 140 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. Thursday 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 22% of their flights experiencing any sort of delay.

As of October 2026, 1 flights take off from Portugal and land in Chicago O'Hare Intl Airport each day. The most common flight departure time for this route is 12:00PM, with 100% of daily flights taking off in the afternoon.

As of October 2026, there are 8 flights per week flying from Portugal to Chicago O'Hare Intl Airport. The most common day of the week flights depart is Wed, with 25% of flights taking off on this day.