Cheap flights from Chicago to Porto from $300
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Porto departing on 7/22. 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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KLM flights from Chicago to Porto
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How to get the cheapest flight ticket from Chicago to Porto
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 Porto?
The month of November is, on average, the cheapest month to fly to Porto from Chicago, with most prices found around $539. If you aren’t able to travel during the month of November, then book flights to Porto from Chicago during February instead. Flights to Porto in February, while not as cheap as those in November, still average around $548.
What is the cheapest day to depart on your flight to Porto?
The cheapest day to depart on your flight to Porto is on a Monday when prices can be found for as low as $708. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $808. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.
What is the cheapest time of day to depart on your flight to Porto?
In the evening is the cheapest time of day to fly from Chicago to Porto when you can find flight prices for as low as $611. Flying to Porto in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,018 on average. Flights to Porto from Chicago at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.
How far in advance should I book a flight to Porto?
You are more likely to see cheaper flights to Porto from Chicago when booking 18 weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $698 when searching 18 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Chicago for as low as $664 on momondo.
What is the cheapest airline that flies from Chicago to Porto?
TAP AIR PORTUGAL, SWISS, and Scandinavian Airlines are the most popular carriers operating from Chicago to Porto
What airlines fly to Porto?
TAP AIR PORTUGAL, United Airlines and KLM are the top three most popular airlines that fly to Porto from Chicago according to our data. TAP AIR PORTUGAL is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 10 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.
When to book flights from Chicago to Porto
Cheap Chicago to Porto (CHI to OPO) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Chicago to Porto
How far is Chicago to Porto by plane?
A flight from Chicago to Porto will travel around 3927.7 mi. By plane, this route typically takes 10h 45m.
When did momondo last update prices for flights from Chicago to Porto Airport?
Prices for flights from Chicago to Porto Airport refresh daily.
How many operators does momondo search for flights from Chicago to Porto Airport?
As of April 2025, there are 10 operators available to choose from for flights from Chicago to Porto Airport.
How old do you have to be to fly from Chicago to Porto Airport?
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 Chicago to Porto Airport.
What documentation or ID do you need to fly to Porto Airport?
The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Chicago to Porto?
Based on momondo bookings for flights between Chicago and Porto, the leading airline is TAP AIR PORTUGAL, making up 28% of the total bookings. Other popular airlines include United Airlines with 19%, KLM with 13%, and Delta with 11%.
Best airlines flying from Chicago to Porto
Compare and see reviews for airlines that fly from Chicago to Porto with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $416 | Free Cancellation | Rating 7.1 1,846 reviews | |||
| PriceFrom $468 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $472 | Free Cancellation | Rating 7.0 2,686 reviews | |||
| PriceFrom $504 | Free Cancellation | Rating 6.6 6,805 reviews | |||
| PriceFrom $514 | Free Cancellation | Rating 8.0 7,920 reviews | |||
| PriceFrom $535 | Free Cancellation | Rating 6.7 7,030 reviews | |||
| PriceFrom $558 | Free Cancellation | Rating 7.5 1,582 reviews | |||
| PriceFrom $563 | Free Cancellation | Rating 7.8 1,333 reviews | |||
| PriceFrom $584 | Free Cancellation | Rating 7.4 8,685 reviews | |||
| PriceFrom $646 | Free Cancellation | Rating 7.0 9,195 reviews |
Traveling to a place near Porto?
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Why should I use momondo to find a flight deal from Chicago to Porto?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Chicago to Porto. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Chicago to Porto with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Chicago to Porto flights to just show those with flexible booking policies.
How can momondo help me find flights from Chicago to Porto?
momondo provides multiple filters to help you find the best flight to Porto from Chicago. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Chicago to Porto right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Chicago to Porto flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.