Cheap flights from Illinois to Porto from $284
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Porto departing on 4/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Illinois to Porto
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
SWISS flights from Illinois to Porto
Our best SWISS deals on Illinois to Porto flight tickets
KLM flights from Illinois to Porto
Our best KLM deals on Illinois to Porto flight tickets
See travel insights to Porto from
How to get the cheapest flight ticket from Illinois 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 February is, on average, the cheapest month to fly to Porto from Illinois, with most prices found around $525. If you aren’t able to travel during the month of February, then book flights to Porto from Illinois during November instead. Flights to Porto in November, while not as cheap as those in February, still average around $541.
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 Illinois 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 Illinois 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 Illinois when booking 26 weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $734 when searching 26 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Illinois for as low as $623 on momondo.
What is the cheapest airline that flies from Illinois to Porto?
TAP AIR PORTUGAL, Scandinavian Airlines, and KLM are the most popular carriers operating from Illinois 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 Illinois 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 9 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.
Cheap Illinois to Porto flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Illinois to Porto
When did momondo last update prices for flights from Illinois to Porto Airport?
Prices for flights from Illinois to Porto Airport refresh daily.
How many operators does momondo search for flights from Illinois to Porto Airport?
As of February 2025, there are 9 operators available to choose from for flights from Illinois to Porto Airport.
How old do you have to be to fly from Illinois to Porto Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois 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.
Best airlines flying from Illinois to Porto
Compare and see reviews for airlines that fly from Illinois to Porto with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $419 | Free Cancellation | Rating 7.2 1,839 reviews | |||
| PriceFrom $468 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $472 | Free Cancellation | Rating 7.0 2,641 reviews | |||
| PriceFrom $519 | Free Cancellation | Rating 8.0 8,165 reviews | |||
| PriceFrom $534 | Free Cancellation | Rating 6.7 6,981 reviews | |||
| PriceFrom $563 | Free Cancellation | Rating 7.8 1,332 reviews | |||
| PriceFrom $612 | Free Cancellation | Rating 7.4 8,733 reviews | |||
| PriceFrom $616 | Free Cancellation | Rating 7.5 1,568 reviews | |||
| PriceFrom $648 | Free Cancellation | Rating 7.0 8,778 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 Illinois to Porto?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Porto for you.
Can I find flights from Illinois to Porto with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Porto from Illinois with this policy.
How can momondo help me find flights from Illinois to Porto?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Porto from Illinois.
I’m not ready to book a flight from Illinois to Porto right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Illinois to Porto now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Porto and let you know when they change.