Cheap flights from Sofia to Illinois from $351
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sofia to Illinois departing on 6/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
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 Sofia to Illinois
Cheap round-trip flights
Cheap one-way flights
United Airlines flights from Sofia to Illinois
Our best United Airlines deals on Sofia to Illinois flight tickets
KLM flights from Sofia to Illinois
Our best KLM deals on Sofia to Illinois flight tickets
See travel insights to Illinois from
How to get the cheapest flight ticket from Sofia to Illinois
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 Illinois?
The cheapest month to fly to Illinois from Sofia is in November. Flight prices, which tend to average around $647, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of November, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $650.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Sofia to Illinois is on a Thursday when prices can be found for as low as $666. Flights from Sofia to Illinois on a Wednesday will generally be more expensive and average around $785. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Sofia to Illinois during this time can be as low as $666. Flights in the evening are often more expensive with an average ticket price of $768.
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from Sofia when booking 22 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $721 when searching 22 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Sofia for as low as $632 on momondo.
What is the cheapest airline that flies from Sofia to Illinois?
Air Serbia, British Airways, and Qatar Airways are the most popular carriers operating from Sofia to Illinois
What airlines fly to Illinois?
Lufthansa, LOT and Turkish Airlines are the top three most popular airlines that fly to Illinois from Sofia according to our data. Lufthansa is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 8 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
Cheap Sofia to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Sofia to Illinois
When did momondo last update prices for flights from Sofia Airport to Illinois?
Prices for flights from Sofia Airport to Illinois are updated daily.
How many operators does momondo search for flights from Sofia Airport to Illinois?
As of April 2025, there are 8 operators available to choose from for flights from Sofia Airport to Illinois.
How old do you have to be to fly from Sofia Airport to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Sofia Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
Best airlines flying from Sofia to Illinois
Compare and see reviews for airlines that fly from Sofia to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $460 | Free Cancellation | Rating 7.8 1,329 reviews | |||
| PriceFrom $496 | Free Cancellation | Rating 7.6 1,065 reviews | |||
| PriceFrom $546 | Free Cancellation | Rating 6.6 6,767 reviews | |||
| PriceFrom $560 | Free Cancellation | Rating 7.5 1,435 reviews | |||
| PriceFrom $576 | Free Cancellation | Rating 7.5 775 reviews | |||
| PriceFrom $601 | Free Cancellation | Rating 6.7 7,012 reviews | |||
| PriceFrom $603 | Free Cancellation | Rating 7.4 8,667 reviews | |||
| PriceFrom $627 | Free Cancellation | Rating 7.3 3,767 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Sofia to Illinois?
Finding the right flight to Illinois from Sofia is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.
Can I find flights from Sofia to Illinois with flexible booking policies on momondo?
All flight searches from Sofia to Illinois on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Sofia to Illinois?
momondo helps you find the best flight between Sofia and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Sofia to Illinois right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Illinois, momondo offers a useful price alert feature which will track prices for flights to Illinois from Sofia and alert you when they change.