There is a useful departure option in Seoul that many first-time visitors never realize exists.

If your airline and route are eligible, you can go to the Seoul Station City Airport Terminal, check in for your flight, hand over your checked baggage and complete Korean departure immigration before travelling to Incheon Airport.

The basic process is:

Buy an AREX Express Train ticket → go to Seoul Station B2 → check in and drop baggage → complete departure immigration → take the AREX Express Train → arrive at Incheon Airport → use the dedicated departure lane → pass security → go to your gate.

The service is not available to every airline, route or passenger.

That is the first thing to check.

Last fact-checked: October 2026.

Contents

Table of Contents

Seoul Station City Airport Terminal at a Glance

Item	Current Rule
Location	Seoul Station, Airport Railroad B2
Who can use it	AREX Express Train ticket holders
Flight	Same-day international flight from Incheon Airport
Check-in hours	05:20–19:00
Check-in reception closes	18:50
Departure immigration	05:30–19:00
T1 check-in deadline	Complete check-in at least 3 hours before departure
T2 check-in deadline	Complete check-in at least 3 hours 20 minutes before departure
Main services	Airline check-in, checked baggage, departure immigration
Airport benefit	Dedicated departure lane after arrival at Incheon

The most important point is:

You cannot use the City Airport Terminal simply because you are flying from Incheon Airport.

Your airline and route must be eligible, and you must have an AREX Express Train ticket.

What Is the Seoul Station City Airport Terminal?

The Seoul Station City Airport Terminal is an airport check-in facility inside Seoul Station.

It is located on B2 of the Airport Railroad area.

Eligible travelers can complete three important departure tasks there:

Airline check-in
Checked-baggage drop
Korean departure immigration

You then travel to Incheon Airport without carrying your checked suitcase.

At the airport, passengers who completed both check-in and departure immigration at Seoul Station can use the designated City Airport Terminal departure lane.

This can make the final day of a Korea trip much easier.

Who Can Use It?

You must meet the basic requirements.

You need:

a same-day international flight departing from Incheon Airport
an airline and route supported by the Seoul Station City Airport Terminal
an AREX Express Train ticket from Seoul Station to Incheon Airport

The service is not available simply because you are taking the Airport Railroad.

The AREX all-stop train does not qualify you for City Airport Terminal check-in.

You need an Express Train ticket.

Step 1: First Check Your Airline

This should be your first check.

As of October 2026, the official AREX list shows the following airlines.

Terminal 1

Jeju Air

Available except certain Americas routes, including Guam and Saipan.

T’way Air

Available except certain Americas routes such as Guam and Saipan.

Eligible codeshare flights operated by T’way aircraft may also be accepted.

Eastar Jet

Flights operated by Eastar Jet are currently listed as eligible.

Terminal 2

Korean Air

Eligible flights include codeshares operated by Korean Air.

Asiana Airlines

Eligible flights include codeshares operated by Asiana Airlines.

Jin Air

Available except certain Americas routes including Guam and Saipan.

Codeshares operated by Jin Air aircraft may also qualify.

Air Busan

Codeshare flights operated by Air Busan aircraft may qualify.

Air Seoul

Available except certain Americas routes including Guam and Saipan.

Codeshares operated by Air Seoul aircraft may also qualify.

Important: Check the Operating Airline

A codeshare can cause confusion.

Your ticket may show one airline’s flight number while the aircraft is operated by another airline.

For Seoul Station check-in, the operating carrier can matter.

Look for wording such as:

Operated by Korean Air
Operated by Asiana Airlines
Operated by Jin Air

Do not decide only from the marketing airline shown at the top of your ticket.

The safest approach is to confirm City Airport Terminal eligibility with the airline before using the service.

Step 2: Check Your Flight Time

The service has an earlier deadline than normal airport check-in.

Current Seoul Station check-in hours are:

05:20–19:00

with reception closing at:

18:50

But your personal deadline depends on your airport terminal.

Terminal 1

You must complete City Airport Terminal check-in at least:

3 hours before flight departure

Terminal 2

You must complete check-in at least:

3 hours 20 minutes before departure

This is a hard planning point.

Do not compare your flight time only with the 19:00 closing time.

Example: 5:00 PM Flight

If your flight leaves Incheon Airport at 5:00 PM:

Terminal 1 flight

You must complete Seoul Station check-in by:

2:00 PM

Terminal 2 flight

You must complete Seoul Station check-in by:

1:40 PM

So this is not a service you use immediately before rushing to the airport.

It works best when you check in early and travel to the airport comfortably afterward.

Step 3: Buy Your AREX Express Train Ticket

Before using the City Airport Terminal, purchase an AREX Express Train ticket for that day.

You will use the ticket QR code to enter the City Airport Terminal.

Current AREX Express travel times are approximately:

Route	Travel Time
Seoul Station → Terminal 1	43 minutes
Seoul Station → Terminal 2	51 minutes

The currently listed adult Express Train fare is KRW 13,000.

Schedules and fares can change, so check the current AREX timetable before departure.

Official AREX information:

https://www.airportrailroad.com/train/express/introduce

Step 4: Go to Seoul Station B2

The City Airport Terminal is located at:

Seoul Station Airport Railroad, B2

Do not simply follow signs for KTX or Seoul Subway Line 1 or 4.

Seoul Station is large.

Look specifically for:

Airport Railroad / AREX

and then:

City Airport Terminal

If you are arriving by taxi with large luggage, allow some extra walking time inside the station.

Step 5: Scan Your Express Train QR Code

Your AREX Express Train ticket gives you access to the City Airport Terminal.

Scan the ticket QR code at the entrance gate.

Then proceed to the airline check-in area.

The terminal was renovated in 2026, with improved waiting and check-in flow.

Step 6: Check In for Your Flight

At the airline counter, you complete a process similar to airport check-in.

Have ready:

passport
flight booking
required destination travel documents
baggage

The airline will verify your flight and eligibility.

If everything is accepted, you receive your boarding pass and can check your baggage.

What Happens to Your Checked Suitcase?

The City Airport Terminal accepts eligible checked baggage on behalf of participating airlines.

Once your suitcase is accepted, you do not carry it onto the AREX train.

That is one of the biggest advantages of the service.

Before handing it over, remove anything you still need during the journey to the airport, including:

passport
wallet
medication
phone charger
valuables
power bank
documents
items needed for airport procedures

Normal airline baggage restrictions still apply.

Oversized and Special Baggage Can Be Restricted

Not every item can be checked at Seoul Station.

The current AREX City Airport Terminal guidance excludes certain special-handling items such as sports equipment and musical instruments, as well as oversized baggage that falls outside the service’s accepted limits.

AREX currently defines large baggage using limits including:

45 × 90 × 60 cm or larger, or 50 kg or heavier

and also notes restrictions for items over 150 cm in length.

If you have:

sports equipment
golf clubs
musical instruments
unusually large baggage
other special-handling items

confirm acceptance directly with the airline before relying on Seoul Station check-in.

In that situation, normal airport check-in may be simpler.

Step 7: Complete Departure Immigration at Seoul Station

After airline check-in and baggage drop, complete Korean departure immigration at the City Airport Terminal.

Current operating hours are:

05:30–19:00

This is an important part of the service.

It means that when you arrive at Incheon Airport, you generally do not need to join the normal departure-immigration queue again.

But this does not mean you skip airport security.

Security screening still happens at Incheon Airport.

Step 8: Take the AREX Express Train

After finishing your Seoul Station procedures, go to the AREX Express Train platform.

Current scheduled journey time is approximately:

43 minutes to Terminal 1
51 minutes to Terminal 2

Make sure you get off at the terminal shown on your flight information.

Do not assume your airline uses the same terminal it used on a previous trip.

Check your actual flight.

Step 9: At Incheon Airport, Go to the Departure Floor

After getting off the AREX:

Follow signs into the airport terminal.
Go to the 3rd-floor Departure Hall.
Look for the dedicated City Airport Terminal departure lane.

You already checked your suitcase in Seoul, so you do not need to visit the normal airline baggage counter unless the airline specifically tells you otherwise.

Step 10: Use the Dedicated Departure Lane

Travelers who completed both:

airline check-in
departure immigration

at Seoul Station can use the dedicated departure lane at Incheon Airport.

Follow airport signs for the lane used by City Airport Terminal passengers.

Both Terminal 1 and Terminal 2 currently support this process.

Do You Still Go Through Security?

Yes.

City Airport Terminal check-in does not remove airport security screening.

You still go through security at Incheon Airport.

The difference is that you have already completed:

airline check-in
baggage drop
Korean departure immigration

So after the dedicated departure route and security screening, continue toward the duty-free departure area and your gate.

What You Do Not Need to Do Again at Incheon

If everything was successfully completed at Seoul Station, you generally do not need to:

check in again
drop your normal checked baggage again
complete ordinary departure immigration again

You still need to:

pass airport security
check your gate
reach the gate before boarding

Always follow airline or airport staff if they give you different instructions.

Can You Check In Early and Spend More Time in Seoul?

Yes.

This is one of the service’s biggest advantages.

A practical final-day plan might be:

Check out of your Seoul hotel in the morning.
Go to Seoul Station.
Check in and hand over your suitcase.
Complete departure immigration.
Spend some additional time nearby.
Return to Seoul Station.
Take your reserved AREX Express Train.
Travel to Incheon Airport without your checked suitcase.

However, you still need enough time to reach the airport and your boarding gate.

Do not turn early check-in into an excuse to arrive at the airport dangerously late.

Who Benefits Most From Seoul Station Check-in?

This service is particularly useful if:

your hotel is near Seoul Station
you have a normal checked suitcase
your airline is eligible
your flight is late enough to meet the check-in deadline
you want to spend the final part of the day without carrying luggage
you already plan to use the AREX Express Train

It can be especially convenient on the last day of a trip.

When Is It Not Worth Using?

Normal Incheon Airport check-in may be easier if:

your airline is not supported
your route is excluded
your flight is too early
you are staying far from Seoul Station
you planned to use an airport limousine bus or taxi
you have special or oversized baggage
you need unusual airline assistance
travelling to Seoul Station creates a large detour

The City Airport Terminal is useful only when it fits your route.

Do not cross Seoul simply to use it.

What About an Early-Morning Flight?

Be careful.

Check-in at Seoul Station starts at 05:20.

You also need to complete the process:

3 hours before a Terminal 1 flight
3 hours 20 minutes before a Terminal 2 flight

Therefore, many very early-morning flights cannot practically use the City Airport Terminal.

For an early flight, normal airport check-in may be necessary.

What About a Late-Evening Flight?

Late-evening flights can work well because you may have time to check in earlier during the day.

However, City Airport Terminal check-in operates only until 19:00, with reception closing at 18:50.

The T1/T2 flight-time cutoff still applies.

Check both conditions.

Tax Refund Items Need Extra Attention

If you are carrying tax-refund goods that may need customs inspection at Incheon Airport, think carefully before placing those goods inside baggage checked at Seoul Station.

Customs may need to inspect certain refund-eligible goods before departure.

If this applies to you:

keep the relevant goods accessible, or
confirm the correct procedure before checking the suitcase

Do not hand over a suitcase containing goods you may need to present later and assume you can retrieve it easily at the airport.

Can You Use the All-Stop AREX Train After Check-in?

The City Airport Terminal service is specifically for AREX Express Train ticket holders.

If your plan is to use the all-stop train, do not assume you can complete City Airport Terminal check-in first.

The Express Train ticket is part of the eligibility requirement.

Express Train or All-Stop Train?

The two services are different.

	AREX Express	AREX All-Stop
Stops	Non-stop to airport terminals	Stops at intermediate stations
Reserved seat	Yes	No standard reserved seating
City Airport Terminal eligibility	Yes	No
Seoul–T1 time	About 43 min	Longer
Seoul–T2 time	About 51 min	Longer

If City Airport Terminal check-in matters to you, choose the Express Train.

Example: 6:00 PM Terminal 2 Flight

Suppose your flight departs Terminal 2 at 6:00 PM.

Because Terminal 2 check-in must be completed at least 3 hours 20 minutes before departure, your Seoul Station check-in deadline is:

2:40 PM

A possible schedule could be:

11:00 AM

Arrive at Seoul Station.

11:15 AM

Enter the City Airport Terminal and check in.

11:30 AM

Drop your suitcase.

After check-in

Complete departure immigration.

Early afternoon

Have lunch or spend some remaining time nearby.

Later

Return to the AREX area and take your reserved Express Train.

At Incheon Airport

Go to the departure floor.

Use the dedicated City Airport Terminal lane.

Pass security.

Check your gate.

Board your flight.

Always leave a comfortable airport margin.

First-Time Mistakes to Avoid

1. Assuming Every Airline Is Eligible

Check the current AREX airline list.

2. Buying an All-Stop Train Ticket

City Airport Terminal eligibility requires an Express Train ticket.

3. Ignoring the T1/T2 Deadline

Terminal 1 and Terminal 2 have different check-in cutoffs.

4. Looking Only at the 19:00 Closing Time

Your flight-specific deadline may be much earlier.

5. Forgetting Something Inside Checked Baggage

Once your suitcase is checked, keep all essential items with you.

6. Assuming City Check-in Means No Airport Security

You still pass security at Incheon Airport.

7. Arriving at Incheon Airport Too Late

City check-in saves steps.

It does not change your flight’s boarding time.

Seoul Station City Airport Terminal Checklist

Before Going to Seoul Station

Check your airline
Check operating carrier
Check route restrictions
Confirm Terminal 1 or Terminal 2
Calculate your check-in deadline
Buy an AREX Express Train ticket
Check baggage restrictions

At Seoul Station

Go to Airport Railroad B2
Scan the Express Train QR code
Check in with the airline
Drop eligible baggage
Keep valuables and essential items
Complete departure immigration

Before Taking the Train

Check train departure time
Check airport terminal
Keep passport and boarding pass accessible

At Incheon Airport

Go to 3F Departures
Find the City Airport Terminal dedicated lane
Pass security
Check your gate
Reach the gate before boarding

Final Advice

The Seoul Station City Airport Terminal can make your last day in Korea significantly easier.

But only if you qualify.

Remember the sequence:

Express Train Ticket → Seoul Station B2 → Airline Check-in → Baggage Drop → Departure Immigration → AREX Express → Incheon Airport → Dedicated Lane → Security → Gate

Before building your departure around the service, check three things:

Is my airline eligible?
Is my route eligible?
Can I complete check-in before the T1 or T2 deadline?

If all three answers are yes, the Seoul Station City Airport Terminal can remove one of the most inconvenient parts of airport departure:

carrying your checked suitcase all the way to Incheon Airport.

For broader Korea trip planning, return to CoreaDesk’s Start Here guide.

Official Information

AREX — Seoul Station City Airport Terminal
https://www.airportrailroad.com/train/express/city/info

AREX — Express Train Information
https://www.airportrailroad.com/train/express/introduce

AREX — Express Train Timetable
https://www.airportrailroad.com/train/express/info

Incheon International Airport — City Airport Terminal Services
https://airinfo.airport.kr/ap_en/1420/subview.do