Ulaanbaatar to San Francisco UBN → SFO
Chinggis Khaan International Airport (UBN) → San Francisco International Airport (SFO)
The cheapest return found recently is $1,072 with Air China, 23 Oct – 25 Nov, found yesterday. The cheapest one-way found recently is $793 with MIAT Mongolian Airlines, 23 Jun 2027, found 2 days ago.
Return
The cheapest return fare on each of 4 departure dates is usually $1,038 to $1,294.
Cheapest return found recently
$1,072
23 Oct – 25 Nov · Air China
Chinggis Khaan International Airport (UBN) → San Francisco International Airport (SFO)
Leaves 4:30 p.m. · Return leaves 12:00 p.m. · 63 h 40 min of travel, both ways together
out 1 stop, back 1 stop
found yesterday
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$1,072 23 Oct – 25 Novfound yesterdaySee prices for these dates
$935 1 Dec – 16 Decfound 5 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $935 to $1,295.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 4 departure dates from 23 Oct to 2 Feb 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 33-night return fares leaving within 3 days of 23 Oct to compare.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 23 Oct – 25 Nov | $1,072 | Air China | Chinggis Khaan International Airport (UBN) → San Francisco International Airport (SFO) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 1 Dec – 16 Dec | $935 | Air China | Chinggis Khaan International Airport (UBN) → San Francisco International Airport (SFO) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 11 Jan 2027 – 20 Jan 2027 | $1,422 | MIAT Mongolian Airlines | Chinggis Khaan International Airport (UBN) → San Francisco International Airport (SFO) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 2 Feb 2027 – 19 Feb 2027 | $1,251 | Korean Air | Chinggis Khaan International Airport (UBN) → San Francisco International Airport (SFO) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
Which month looks cheapest?
December 2026 is the cheapest month — from $935.
Airlines on the cheapest dates: Air China, MIAT Mongolian Airlines, Korean Air.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$793
23 Jun 2027 · MIAT Mongolian Airlines
Chinggis Khaan International Airport (UBN) → San Francisco International Airport (SFO)
Leaves 12:55 p.m. · 22 h 40 min trip
2 stops
found 2 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$793 23 Jun 2027found 2 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 3 days, 16 Oct to 18 Oct, the cheapest one-way we saw each day was $793 to $812.
At $793, the cheapest one-way found recently is at the low end of that range.
3 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Not enough comparable prices yet: we hold one-way fares on 2 departure dates and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 23 Jun 2027 to compare.
Every date we hold
2 fares on 2 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 22 Oct | $812 | United Airlines | Chinggis Khaan International Airport (UBN) → San Francisco International Airport (SFO) | stops unknown | found 3 days ago | Open this trip |
| 23 Jun 2027 | $793 | MIAT Mongolian Airlines | Chinggis Khaan International Airport (UBN) → San Francisco International Airport (SFO) | 2 stops | found 2 days ago | Open this trip |
Which month looks cheapest?
June 2027 is the cheapest month — from $793.
Airlines on the cheapest dates: United Airlines, MIAT Mongolian Airlines.
Premium cabin fares from Ulaanbaatar to San Francisco
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 23 Oct – 25 Nov in another cabin: Premium economy · Business · First
Today's prices for 23 Jun 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ulaanbaatar to San Francisco?
Return
Timing didn't matter much here — prices were about the same in every range.
From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 30–59 days | $1,295 | $935 | +5% | 12 |
| 60–89 days | $1,238 | $983 | Cheapest seen | 20 |
| 180+ days | $1,279 | $1,279 | +3% | 7 |
One-way
Not enough history yet: we have 3 days of one-way prices, 16 Oct to 18 Oct, and compare booking times once 3 booking ranges have 7 days each.
Live price for these dates
The cheapest return found recently is for 23 Oct – 25 Nov. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work