Cheap flights from Chicago to Porto from $318
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 2/14. 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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Not ready to book? to track prices.TAP AIR PORTUGAL flights from Chicago to Porto
Our best TAP AIR PORTUGAL deals on Chicago to Porto flight tickets
Delta flights from Chicago to Porto
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Fly from
Fly to
Route
Depart
Return
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Fri 11/13
8:10 pm-5:00 pm
1 stop14h 50m
Porto
Wed 11/18
7:00 am-3:30 pm
1 stop14h 30m
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Sun 12/13
8:10 pm-7:00 pm
1 stop16h 50m
Porto
Tue 2/2
8:00 pm-3:30 pm
1 stop25h 30m
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Sat 1/16
7:10 pm-11:05 am
1 stop33h 55m
Porto
Fri 1/22
5:45 pm-4:45 pm
1 stop29h 00m
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Sun 11/22
8:10 pm-11:45 pm
2 stops21h 35m
Porto
Tue 12/1
8:10 pm-3:30 pm
2 stops25h 20m
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Sun 1/17
5:40 pm-4:00 pm
1 stop16h 20m
Porto
Fri 1/22
8:20 am-2:55 pm
1 stop12h 35m
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Mon 11/30
11:45 am-3:10 pm
1 stop21h 25m
Porto
Thu 12/10
10:55 am-10:00 am
1 stop29h 05m
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Sat 3/20
9:20 pm-9:30 am
1 stop31h 10m
Porto
Wed 3/31
6:00 am-2:50 pm
1 stop14h 50m
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Tue 4/6
8:00 pm-9:45 am
1 stop31h 45m
Porto
Wed 4/28
6:00 am-2:50 pm
1 stop14h 50m
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Sun 10/18
11:25 am-9:40 am
1 stop16h 15m
Porto
Tue 11/3
4:10 pm-11:00 am
1 stop24h 50m
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Sun 12/13
1:30 pm-11:45 am
2 stops16h 15m
Porto
Tue 2/2
8:20 am-10:30 pm
2 stops20h 10m
See travel insights to Porto from
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 typical price of a round-trip flight between Chicago and Porto?
Prices are currently low for flights on this route.
Typical prices usually range from $774 to $1,022.The lowest price recently found on this route was $561.
What is the cheapest month to fly to Porto?
The month of January is, on average, the cheapest month to fly to Porto from Chicago, with most prices found around $577. If you aren’t able to travel during the month of January, then book flights to Porto from Chicago during April instead. Flights to Porto in April, while not as cheap as those in January, still average around $610.
How far in advance should I book a flight from Chicago to Porto?
You are more likely to see cheaper flights to Porto from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $847 when searching 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 $681 on momondo.
What is the cheapest airline that flies from Chicago to Porto?
United Airlines is the most popular carrier operating from Chicago to Porto
What airlines fly to Porto?
TAP AIR PORTUGAL, United Airlines and Lufthansa 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 53% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 5 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.
Which airport is the most popular layover for flights between Chicago and Porto?
Lisbon (LIS) was the most common stop: 66% of momondo users choosing 1-stop flights on this route connected there.
Which layover airport offers the lowest fares from Chicago to Porto?
Flights via Lisbon (LIS) offer the lowest average round-trip price of $791.
Which layover airport has the shortest travel time from Chicago to Porto?
Flights connecting via Lisbon (LIS) have the shortest average one-way travel time: 12h 03m.
Which layover airport has the shortest connection time from Chicago to Porto?
Frankfurt am Main (FRA) has the shortest average layover time for this route: 1h 41m.
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
Frequently asked questions about flying 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 12h 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 October 2026, there are 5 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 81% of the total bookings. Other popular airlines include United Airlines with 19%.
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 $451 | Free Cancellation | Rating 7.2 2,383 reviews | |||
| PriceFrom $474 | Free Cancellation | Rating 6.8 8,266 reviews | |||
| PriceFrom $519 | Free Cancellation | Rating 7.0 3,254 reviews | |||
| PriceFrom $618 | Free Cancellation | Rating 7.4 4,455 reviews | |||
| PriceFrom $623 | Free Cancellation | Rating 7.4 10,303 reviews |
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsWhy use momondo?
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.