RareNonstop · 5h
CHI to SJUPuerto Rico
San Juan
$162
usually $340
−52%
Most monthly lows $287–$340. Cheaper than every other month on record (3).
Flights · CHI → BEG
Chicago to Belgrade
Best fare, round trip
$519
−23%
below its usual $675
you keep $156
GoodFound
- Depart
- Sun 13 Dec
- Return
- Sat 30 Jan
- Stay
- 48 nights
- Flight
- 2 stops · 12h
- Airline
United
Most of this route’s monthly lows fall between $606 and $675. The drop beats 63% of measured fares on the board, over 4 observed months.
Cached fare — the booking search re-prices live before you pay.
SerbiaBelgradeTwo rivers, a fortress between them, and nightlife that starts when other capitals are closing.Best windowMay–Jun · Sep–OctAirportsNikola Tesla (BEG)Every route into BelgradeFare seasonality
When this route gets cheap.
Fares bottom out in December around $519 and peak in October near $729, 40% dearer, across the 4 months we track. The cheapest itinerary we are tracking makes 2 stops and takes about 12 hours outbound, on a 48-night trip — ticketed under United, which on a connecting fare need not operate every leg. At $519 for 8,024 km each way, that works out to about $32 per 1,000 km flown. That is below the $44 per 1,000 km typical of long-haul fares here. Of the 17 departure cities we track at a similar distance from Belgrade, this is the cheapest right now — though Dallas is within a few dollars. That puts it in the cheaper half of the 36 routes of similar length we watch out of Chicago, where the middle fare is $730. The best time to be in Belgrade: May–Jun · Sep–Oct.
Day-level prices for the next 4 months
Press a day to compare its fares
The median cached fare across this calendar is 12% lower than when tracking began on 8 Aug — $826 then versus $731 now, across 17 recorded snapshots. This is a calendar-level trend, so an individual deal above can be lower. The lowest single day we have seen here is $511, on 18 Sep.
Cached day-level data for this route is sparse — 22 of 111 days priced, from 74 tracked fares. The days below are shown as found, with no cheapest-day or below-median call.
October 2026
November 2026
1234567891011121314151617Wednesday 18 November: $756. Compare fares from this day.192021222324252627282930
December 2026
Tuesday 1 December: $720. Compare fares from this day.2Thursday 3 December: $844. Compare fares from this day.4Saturday 5 December: $897. Compare fares from this day.6789101112Sunday 13 December: $519. Compare fares from this day.Monday 14 December: $1.4k. Compare fares from this day.Tuesday 15 December: $1.1k. Compare fares from this day.Wednesday 16 December: $576. Compare fares from this day.Thursday 17 December: $1.2k. Compare fares from this day.Friday 18 December: $1.6k. Compare fares from this day.19202122Wednesday 23 December: $1k. Compare fares from this day.2425262728293031
January 2027
1234567891011121314151617Monday 18 January: $733. Compare fares from this day.19Wednesday 20 January: $673. Compare fares from this day.2122Saturday 23 January: $713. Compare fares from this day.24Monday 25 January: $673. Compare fares from this day.Tuesday 26 January: $673. Compare fares from this day.Wednesday 27 January: $673. Compare fares from this day.28Friday 29 January: $713. Compare fares from this day.Saturday 30 January: $713. Compare fares from this day.31
Cached fares · checked 13 Oct 2026
Cheapest in Dec, around $519
23% below the $675 typical fare
$729Oct, above the usual price. Compare October fares.$606Nov, below the usual price. Compare November fares.$519Dec, the cheapest month. Compare December fares.$673Jan ’27, around the usual price. Compare January fares.$673Feb, around the usual price. Compare February fares.
CheapestBelow usualUsualAbove usualPress a month to compare its fares
Cheapest round-trip fare found each month, Chicago to Belgrade, from cached prices.
Route facts
- Airports
- O’Hare (ORD) · Midway (MDW) ↔ Nikola Tesla (BEG)
- Flight time
- ≈12 hours outbound
- Distance
- ≈8,024 km each way
- Typical price
- $675 round-trip (seasonal median)
- Airlines on the board
- United
- Itineraries
- Connections on current fares
- Best months to visit
- May–Jun · Sep–Oct
Good to know
CHI → BEG, answered.
Is $519 a good price for Chicago to Belgrade?
Yes — the seasonal median for this route is around $675 round-trip. At $519 you're 23% below that, which we rate good for this route.
What is the cheapest month to fly from Chicago to Belgrade?
Across 4 months of cached-fare history, Dec comes out cheapest on this route. The best months to actually be in Belgrade are May–Jun · Sep–Oct — when those overlap, that's your window.
How far in advance should I book CHI → Belgrade?
We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. What we can measure is which month is cheap: across 4 months of cached fares, Dec comes out lowest on this route. Our guide Why flight prices change covers what does move a fare.
Are there nonstop flights from Chicago to Belgrade?
The current cheapest fares involve a connection, ticketed under United. We hold no nonstop fare on this route right now, which does not mean none flies — search your exact dates to see what does.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on 17 October). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.
Next step
Sleeping in Belgrade?
Lock the flight first — then compare stays for 13 Dec – 30 Jan '27 · 48 nights.
Browse hotelsMissed it?
Cached fares expire. This route has a feed of its own — follow it and the next CHI → BEG drop reaches you as soon as we find it.
Follow this route’s feedKeep browsing
Related routes on the board.
Rare1 stop · 3.5h
CHI to DFWUnited States
Dallas
$145
usually $285
−49%
Most monthly lows $223–$285. Cheaper than every other month on record (3).
Rare1 stop · 13h
CHI to CAIEgypt
Cairo
$437
usually $805
−46%
Most monthly lows $760–$929. Cheaper than every other month on record (5).
RareNonstop · 2.5h
BCN to BEGSpain
Barcelona
$62
usually $135
−54%
Most monthly lows $87–$144. Cheaper than every other month on record (10).
RareNonstop · 2h
CPH to BEGDenmark
Copenhagen
$118
usually $200
−41%
Most monthly lows $171–$228. Cheaper than every other month on record (6).
Great1 stop · 5.5h
FRA to BEGGermany
Frankfurt
$116
usually $190
−39%
Most monthly lows $165–$206. Cheaper than every other month on record (6).
