How to go to Myeongdong from ICN airport (and vice versa)

A : Incheon airport ( All stop Arex ) - Seoul station - (transit to Line 4 sky colour) - Myeongdong st. 
approx 90 min. // T-money card 4,150 won , Cash 4,250 won
All stop Arex every 6 - 7 Min. Line 4 sky colour every 10 - 15 min.

B : Incheon airport ( Nonstop Arex ) - Seoul station - (transit to Line 4 sky colour) - Myeongdong st. 
approx 82 min. // T-money card 9,250 won, Cash 9,350 won
Non stop Arex every 30 - 40 Min. Line 4 sky colour every 10 - 15 min.

C : Incheon airport (KTX(300km/h)) - Seoul station - (transit to Line 4 sky colour) - Myeongdong st. 
approx 62 min. // Cash + T-money card 13,250 won, Cash 14,250 won
KTX (300km/h) on your arrival date depart airport 06:55 09:10 09:35 12:07 12:50 15:45 16:30 18:35 20:38. 
Line 4 sky colour every 10 - 15 min

D : Incheon airport ( All stop Limousine bus no. 6015 ) - Myeongdong st. 
70-80 min. // Cash 15,000 won
All stop Limousine bus no. 6015 every 10 min. <right in front of arrival hall, there are bus stops on ground floor> 

E : Incheon airport - (Taxi) - Myeongdong st.
50-60 min. // White or Orange cab Cash 50,000 - 70,000 won + Toll 6,600 won 
Black cab Cash 80,000 - 100,000 won + Toll 6,600 won

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So from ICN to MD, we took Arex with multiple stops.. the total cost is less than W5,000. And mind you, you need to get off at Seoul stn and change to blue line No. 4 towards Myeondong. Go to exit No 9 for direct access to MD guest house

Likewise, fr MD to ICN, we decided to take the airport bus. Too many bags to carry.. and heavy too. The stop is just 50m away fr MD guest hse. This option cost W14,000 with T Money and W15,000 by cash. Bus takes off every 10 to 20 minutes here. Journey by bus started at 8:26am.. arrived ICN at 9:27am

This bus also stops at Namdaemun market, in front of The Bank of Korea.