Korean Air Flight KE645 Deals & Information (2025/2026)

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Korean Air Flight 645 Route Deals From $211

The cheapest prices found with in the last 7 days for return flights were $333 and $211 for one-way flights to Changi for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Jul 5 - Sun, Jul 13
ICN
Incheon Intl.
SIN
Changi
$333 Roundtrip, just found
$333
Roundtrip
just found
Select Korean Air flight, departing Sat, Jul 5 from Incheon Intl. to Changi, returning Sun, Jul 13, priced at $333 just found

Frequently asked questions

What route does flight number KE645 take?
KE645 travels between Seoul--Incheon Intl. Airport and Singapore Airport (SIN-Changi) and is a direct flight. This service takes 6 hours.
How often is KE645 on time?
About 96% of KE645 flights arrive according to scheduled times --- so if you're jetsetting between Seoul Airport (ICN-Incheon Intl.) and Changi Airport (SIN), you can be confident that you'll touch down at your destination ASAP. If this Korean Air flight is late, you can expect to wait about 10 minutes. Due to the air carrier's top-quality service, this route has a 4.45-star rating.
What terminal does KE645 fly out of?
You'll likely be boarding the plane from Terminal 2 if you're traveling on flight KE645 direct from Seoul--Incheon Intl. Airport to Changi Airport.
What kind of plane is on flight number KE645?
You'll likely find yourself cruising aboard the Boeing 777-300ER if you're on flight KE645. Typically, this flight jets off from ICN and lands at Changi Airport.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your KE645 flight with Travelocity, please visit our Customer Service Portal.