SOF

$317 Find Cheap Flights from Illinois to Sofia - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Sofia departing on 7/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Flight Deals

Cheap Flights from Illinois to Sofia

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Sofia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Illinois to Sofia

Wed, Oct 28 - Wed, Nov 11
Lufthansa Logo
4:40 pm - 6:10 pm
STL
-
SOF
18h 30m
1 stop
Lufthansa Logo
6:25 am - 1:45 pm
SOF
-
STL
15h 20m
1 stop
$751Lufthansa
Wed, Oct 28 - Wed, Nov 11
Lufthansa Logo
1:08 pm - 10:45 pm
STL
-
SOF
26h 37m
2 stops
Lufthansa Logo
6:25 am - 1:45 pm
SOF
-
STL
15h 20m
1 stop
$763Lufthansa
Wed, Oct 28 - Wed, Nov 11
Lufthansa Logo
7:04 pm - 6:20 pm
STL
-
SOF
16h 16m
2 stops
Lufthansa Logo
6:25 am - 9:13 pm
SOF
-
STL
22h 48m
2 stops
$768Lufthansa
Sun, Nov 8 - Fri, Nov 20
United Airlines Logo
3:15 pm - 6:20 pm
STL
-
SOF
19h 05m
2 stops
United Airlines Logo
6:25 am - 1:45 pm
SOF
-
STL
15h 20m
1 stop
$769United Airlines
Sun, Nov 1 - Fri, Nov 13
United Airlines Logo
4:30 pm - 6:20 pm
STL
-
SOF
17h 50m
2 stops
United Airlines Logo
6:25 am - 1:45 pm
SOF
-
STL
15h 20m
1 stop
$770United Airlines
Wed, Nov 11 - Wed, Nov 18
Lufthansa Logo
3:40 pm - 1:25 pm
STL
-
SOF
13h 45m
1 stop
Lufthansa Logo
6:25 am - 1:45 pm
SOF
-
STL
15h 20m
1 stop
$776Lufthansa
Tue, Nov 10 - Wed, Nov 18
Multiple Airlines Logo
7:30 am - 1:15 pm
STL
-
SOF
21h 45m
2 stops
Multiple Airlines Logo
2:05 pm - 3:30 pm
SOF
-
STL
33h 25m
2 stops
$778Multiple Airlines
Wed, Nov 4 - Tue, Nov 10
Multiple Airlines Logo
3:40 pm - 6:10 pm
STL
-
SOF
18h 30m
1 stop
Multiple Airlines Logo
2:05 pm - 3:30 pm
SOF
-
STL
33h 25m
2 stops
$781Multiple Airlines
Sun, Jul 26 - Sun, Oct 18
LOT Logo
9:50 pm - 1:50 pm
ORD
-
SOF
32h 00m
1 stop
LOT Logo
6:45 pm - 7:50 pm
SOF
-
ORD
33h 05m
1 stop
$866LOT
Tue, Sep 8 - Wed, Sep 23
SWISS Logo
7:05 pm - 12:10 pm
ORD
-
SOF
33h 05m
2 stops
SWISS Logo
11:05 am - 12:35 pm
SOF
-
ORD
33h 30m
1 stop
$868SWISS
Useful Info

Good to know

Low seasonNovember
Cheapest flight$317
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 18% increase in price.
Flight from Chicago O'Hare Airport to Sofia

FAQs for booking flights from Illinois to Sofia

  • How does KAYAK find such low prices on flights from Illinois to Sofia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Sofia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Sofia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to Sofia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sofia with an airline and back to Illinois with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Sofia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sofia from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
Velingrad
Sandanski

Everything you need to know for your flight to Sofia

Information on the airport you'll fly into in Sofia

Sofia (SOF)