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Flights from Xi'an to Ulaanbaatar

Find the cheapest flight options from Xi'an to Ulaanbaatar over the next three months. Book one-way tickets from THB 3,009 and round-trip tickets from THB 5,541.

      • XIY 06:30
        14h 10m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Fri, Dec 12 | China United Airlines
        UBN 21:40
        12h 55m
        1 stop
        XIY 10:35
        Ulaanbaatar - Xi'an | Sun, Dec 14 | China United Airlines
        THB 5,541 THB 9,150
        39% OFF
        39% OFF
        THB 9,150 THB 5,541
      • XIY 21:00
        23h 40m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Thu, Dec 11 | China United Airlines
        UBN 21:40
        12h 55m
        1 stop
        XIY 10:35
        Ulaanbaatar - Xi'an | Sun, Dec 14 | China United Airlines
        THB 5,568 THB 9,150
        39% OFF
        39% OFF
        THB 9,150 THB 5,568
      • XIY 21:00
        23h 40m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Thu, Jan 1 | China United Airlines
        UBN 21:40
        11h 5m
        1 stop
        XIY 08:45
        Ulaanbaatar - Xi'an | Mon, Jan 5 | China United Airlines
        THB 6,076 THB 9,150
        34% OFF
        34% OFF
        THB 9,150 THB 6,076
      • XIY 06:30
        14h 10m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Fri, Jan 2 | China United Airlines
        UBN 21:40
        10h 55m
        1 stop
        XIY 08:35
        Ulaanbaatar - Xi'an | Fri, Jan 9 | China United Airlines
        THB 6,283
        31% OFF
        THB 9,150 THB 6,283
      • XIY 06:30
        14h 10m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Mon, Dec 15 | China United Airlines
        UBN 21:40
        11h 5m
        1 stop
        XIY 08:45
        Ulaanbaatar - Xi'an | Mon, Dec 22 | China United Airlines
        THB 7,286
        20% OFF
        THB 9,150 THB 7,286
      • XIY 06:30
        14h 10m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Mon, Dec 15 | China Eastern Airlines
        UBN 21:40
        12h 55m
        1 stop
        XIY 10:35
        Ulaanbaatar - Xi'an | Mon, Dec 22 | China United Airlines
        THB 7,353
        20% OFF
        THB 9,150 THB 7,353
      • XIY 06:30
        14h 10m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Fri, Dec 19 | China Eastern Airlines
        UBN 21:40
        11h 5m
        1 stop
        XIY 08:45
        Ulaanbaatar - Xi'an | Mon, Dec 22 | China Eastern Airlines
        THB 7,731
        16% OFF
        THB 9,150 THB 7,731
      • XIY 06:30
        14h 10m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Fri, Jan 2 | China Eastern Airlines
        UBN 21:40
        12h 55m
        1 stop
        XIY 10:35
        Ulaanbaatar - Xi'an | Fri, Jan 9 | China Eastern Airlines
        THB 8,023
        12% OFF
        THB 9,150 THB 8,023
      • XIY 06:30
        14h 10m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Fri, Dec 12 | China Eastern Airlines
        UBN 21:40
        12h 55m
        1 stop
        XIY 10:35
        Ulaanbaatar - Xi'an | Sun, Dec 14 | China United Airlines
        THB 8,167
        11% OFF
        THB 9,150 THB 8,167
      • XIY 21:00
        23h 40m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Thu, Dec 11 | China Eastern Airlines
        UBN 21:40
        12h 55m
        1 stop
        XIY 10:35
        Ulaanbaatar - Xi'an | Sun, Dec 14 | China United Airlines
        THB 8,235
        10% OFF
        THB 9,150 THB 8,235
      • SIA 13:00
        17h 25m
        1 stop
        ULN Invalid Date
        Xi'an - Ulaanbaatar | Sat, Dec 13 | Normal Airline
        ULN 15:00
        6h
        Direct
        SIA 16:00
        Ulaanbaatar - Xi'an | Mon, Dec 15 | Normal Airline
        Find More Flights
        Find More Flights
      • XIY 06:30
        14h 10m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Fri, Dec 12 | China United Airlines
        THB 3,009 THB 4,288
        30% OFF
        30% OFF
        THB 4,288 THB 3,009
      • XIY 21:00
        23h 40m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Sat, Dec 13 | China United Airlines
        THB 3,009 THB 4,288
        30% OFF
        30% OFF
        THB 4,288 THB 3,009
      • XIY 06:30
        14h 10m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Mon, Dec 15 | China United Airlines
        THB 3,009 THB 4,288
        30% OFF
        30% OFF
        THB 4,288 THB 3,009
      • XIY 21:00
        23h 40m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Thu, Dec 18 | China United Airlines
        THB 3,009
        30% OFF
        THB 4,288 THB 3,009
      • XIY 21:00
        23h 40m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Thu, Jan 22 | China United Airlines
        THB 3,131
        27% OFF
        THB 4,288 THB 3,131
      • XIY 21:00
        23h 40m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Sat, Jan 24 | China United Airlines
        THB 3,131
        27% OFF
        THB 4,288 THB 3,131
      • XIY 06:30
        14h 10m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Fri, Jan 23 | China United Airlines
        THB 3,131
        27% OFF
        THB 4,288 THB 3,131
      • XIY 21:00
        23h 40m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Thu, Jan 1 | China United Airlines
        THB 3,756
        12% OFF
        THB 4,288 THB 3,756
      • XIY 06:30
        14h 10m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Fri, Dec 19 | China Eastern Airlines
        THB 3,859
        10% OFF
        THB 4,288 THB 3,859
      • XIY 06:30
        14h 10m
        1 stop
        UBN 20:40
        Xi'an - Ulaanbaatar | Mon, Dec 22 | China Eastern Airlines
        THB 3,859
        10% OFF
        THB 4,288 THB 3,859
      • SIA 13:00
        17h 25m
        1 stop
        ULN Invalid Date
        Xi'an - Ulaanbaatar | Sat, Dec 13 | Normal Airline
        Find More Flights
        Find More Flights

Displayed flight fares from Xi'an to Ulaanbaatar are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight details for Xi'an to Ulaanbaatar

The distance between Xi'an and Ulaanbaatar is 1,521.55km. Based on Trip.com's data, travel demand peaks in July. The off-season for travel is September.

Cheapest one-way flight priceTHB 3,009
Cheapest return ticket priceTHB 5,541
Off-season travel monthSeptember
Peak season for travelJuly
Flight distance1,521.55km

Find the best time to fly from Xi'an to Ulaanbaatar

The cheapest time for Xi'an to Ulaanbaatar flights: Dec 7 to Dec 14 — one way flight prices from THB 3,009.

Cheapest flights
From price
Search
  • 714
  • 1421
  • 2128

  • Jan

    284
  • 411
  • 1118
  • 1825

  • Feb

    251
  • 18
  • 815
  • 1522

  • Mar

    221
Displayed fare trends are based on Trip.com's aggregated average of the lowest flight prices from Xi'an to Ulaanbaatar, calculated over the upcoming 10 weeks.

Flight FAQs

  • Which airlines offer the cheapest flights from Xi'an (SIA) to Ulaanbaatar (ULN)?

    Based on Trip.com data, China United Airlines offers one-way fares as low as THB 3,009 on Cheapest nonstop routes (e.g. XIY to UBN on Fri, Dec 12), while China United Airlines offers Cheapest nonstop round-trips from THB 5,541 departing on Fri, Dec 12 and returning on Sun, Dec 14.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Xi'an to Ulaanbaatar is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Xi'an to Ulaanbaatar, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Fri, Dec 12, with one-way flights priced at just THB 3,009.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is China United Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Ulaanbaatar travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Xi'an to Ulaanbaatar is September, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Xi'an to Ulaanbaatar on December 18, 2025 with China United Airlines, with prices starting at THB 6,642.
  • The time difference between Ulaanbaatar and Xi'an is 0h.
  • Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

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