Find cheap United Airlines flights to Sofia
RDU — SOF
Oct 31 — Nov 71
Round-trip
1 adult, Economy
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Cheapest United Airlines flights from USA to SofiaExplore the most affordable United Airlines flight options available from USA to Sofia. Find the lowest fares with prices last updated on October 1, 2026.
Explore the most affordable United Airlines flight options available from USA to Sofia. Find the lowest fares with prices last updated on October 1, 2026.
This United Airlines deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2811:22 am -
2 stops19h 53m
Wed 11/117:55 am -
1 stop13h 00m
Deal found 9/26![United Airlines logo]()
$771
This United Airlines deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/273:08 pm -
2 stops14h 42m
Tue 11/37:55 am -
2 stops16h 15m
Deal found 9/29![United Airlines logo]()
$785
This United Airlines deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2911:09 am -
2 stops29h 46m
Thu 11/127:55 am -
1 stop13h 00m
Deal found 9/27![United Airlines logo]()
$786
Best United Airlines flights from USA to SofiaDiscover carefully curated United Airlines flight deals from USA to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 1, 2026.
Discover carefully curated United Airlines flight deals from USA to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 1, 2026.
This United Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/119:40 pm -
1 stop15h 15m
Thu 1/146:25 am -
1 stop19h 40m
Deal found 9/30![United Airlines logo]()
$716
This United Airlines deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/11:40 pm -
1 stop23h 15m
Wed 2/176:25 am -
1 stop19h 40m
Deal found 9/28![United Airlines logo]()
$717
This United Airlines deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/21:30 pm -
2 stops15h 45m
Wed 3/106:25 am -
2 stops19h 18m
Deal found 9/26![United Airlines logo]()
$719
Last-minute United Airlines flights from USA to SofiaDiscover last-minute United Airlines flight deals from USA to Sofia. Data last updated October 1, 2026 and is based on user searches.
Discover last-minute United Airlines flight deals from USA to Sofia. Data last updated October 1, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2811:22 am -
2 stops19h 53m
Wed 11/117:55 am -
1 stop13h 00m
Deal found 9/26![United Airlines logo]()
$771
This United Airlines deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/273:08 pm -
2 stops14h 42m
Tue 11/37:55 am -
2 stops16h 15m
Deal found 9/29![United Airlines logo]()
$785
This United Airlines deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2911:09 am -
2 stops29h 46m
Thu 11/127:55 am -
1 stop13h 00m
Deal found 9/27![United Airlines logo]()
$786
One-way United Airlines flights to SofiaSearch for one-way United Airlines flight options to Sofia. Find affordable one-way fares based on user searches. Data last updated October 1, 2026.
Search for one-way United Airlines flight options to Sofia. Find affordable one-way fares based on user searches. Data last updated October 1, 2026.
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/306:00 pm -
1 stop11h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![United Airlines logo]()
$332
This United Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/236:00 pm -
2 stops36h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![United Airlines logo]()
$350
This United Airlines deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/56:23 pm -
3 stops33h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![United Airlines logo]()
$369
Flights to Sofia with United Airlines at a glance
Find detailed information about United Airlines flights from USA to Sofia. Explore the options provided by United Airlines to plan your journey from USA to Sofia. Data last updated October 1, 2026.
Cheapflights Insights
Find cheap United Airlines flights to Sofia
US0-SOF
SFO-SOF
ORD-SOF
EWR-SOF
TPA-SOF
How long is the flight to Sofia with United Airlines?
On average, United Airlines flights from the United States to Sofia take 12 hours 28 minutes. Flights to Sofia from other popular cities in the United States will vary in length. Below are a few examples of popular routes and their flight times.
When is the best time to book a flight to Sofia with United Airlines?
The best time to book a flight to Sofia with United Airlines is 89 days before departure. On average, fares are higher if you book 60 days before departure.
FAQs about flights to Sofia with United Airlines
Reviews of United Airlines
See what Cheapflights users have to say about their United Airlines experience.
Overview
Reviews
United Airlines
10,000 reviews
Overview
Food
6.7
Entertainment
7.1
Crew
8.1
Comfort
7.3
Boarding
7.7
Recent reviews
10.0
|Sep 2026Everything was good
8.0
|Sep 2026The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
10.0
|Aug 2026Staff friendly, good boarding experience
4.0
|Aug 2026Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!
2.0
|Aug 2026I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible
1 out of 3334
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