
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Popular in | December |
Cheapest in | November |
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
Incheon (ICN) – chosen by Cheapflights users on 85% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to Ulaanbaatar on Cheapflights.
Incheon (ICN) is the most affordable 1-stop option, with an average round-trip price of $1,063.
Flights via Istanbul (IST) have the shortest average one-way travel time for 1-stop routes: 21h 40m.
Flights via Istanbul (IST) offer the fastest connection on this route, with an average layover time of 3h 08m.
Entertainment
Boarding
Comfort
Crew
Overall
Food
Reviews
Chris,Mar 2025
SEA - ICN
Entertainment
Boarding
Comfort
Crew
Overall
Food
Reviews
Chris,Mar 2025
SEA - ICN
Entertainment
Boarding
Comfort
Crew
Overall
Food
Reviews
Chris,Mar 2025
SEA - ICN
Entertainment
Boarding
Comfort
Crew
Overall
Food
Reviews
Chris,Mar 2025
SEA - ICN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$951 | Average$1,280 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$986 | Average$1,192 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$1,037 | Average$1,273 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$1,042 | Average$1,482 | FlexibilityNo cancel fee | On-time63% |