Jeju Air Incheon-Sendai flights in 2027

Jeju Air plans to begin nonstop flights between Seoul Incheon International Airport (ICN) and Sendai Airport (SDJ) on January 8, 2027. The route is scheduled three times a week, on Wednesdays, Fridays and Sundays.

Both the start date and timetable remain subject to government approval. Check the exact travel date on Jeju Air before making a non-refundable hotel or onward-transport booking.

*Original AI-generated OpenSim editorial image. The unbranded aircraft and composite landscape do not show a real flight, airport or city.*

The practical answer: Flight 7C1631 is planned to leave Incheon at 8:35 a.m. and reach Sendai at 10:30 a.m. Flight 7C1632 is planned to leave Sendai at 11:30 a.m. and arrive at Incheon at 2:40 p.m. All times are local. The service is planned for Wednesday, Friday and Sunday, subject to approval.

This guide was checked on October 23, 2026.

The announced timetable has three weekly round trips

The joint Jeju Air and Sendai Airport release gives the start date, flight numbers, local times and aircraft plan. It describes the service as Jeju Air's first scheduled route to Japan's Tohoku region and the region's only scheduled low-cost-carrier link with South Korea.

The elapsed times look different because South Korea is one hour behind Japan. The outbound journey is scheduled for 1 hour 55 minutes, while the return occupies 3 hours 10 minutes on the clock but crosses the time-zone boundary.

The schedule is a plan, not a promise that the same aircraft or times will appear on every date. The airport release says operation depends on applications to and approval from the relevant authorities. Use the itinerary issued for the booked date as the working timetable.

Match the booking to the correct airport and day

Search for ICN and SDJ, not simply Seoul and Japan. Seoul also has Gimpo Airport, while travelers heading into the wider Tohoku region may see connections through Tokyo. The new service should appear as a nonstop with flight number 7C1631 or 7C1632.

The three-day pattern matters for short trips. A Wednesday outbound and Sunday return can support a four-night stay, while a Friday departure and Sunday return is much shorter. If the dates do not align, compare the total journey with another airline or a Tokyo connection rather than forcing a separate ticket.

Jeju Air has promoted the launch with limited booking discounts. Treat a headline percentage as a ceiling, not a guaranteed saving. Compare the final total after the fare bundle, checked baggage, seat choice, payment currency and change terms.

Jeju Air's BASIC fare has no free checked bag

Jeju Air's current international fare guide includes a 10 kg cabin allowance on BASIC, STANDARD and BIZ LITE fares. For international routes outside Guam and Saipan, the airline's checked-baggage guide lists no free checked bag with BASIC, 15 kg with STANDARD and 30 kg with BIZ LITE.

Those are weight allowances, not permission for any size. A checked item must have combined dimensions of no more than 158 cm and weigh no more than 32 kg. The allowance attached to the actual booking controls, especially when a travel agent, bundle or promotion is involved.

Buy needed baggage before reaching the airport when the online offer is cheaper. Jeju Air warns that excess baggage presented at the airport can be refused if the aircraft has insufficient cargo capacity. Keep medication, documents, batteries and essential electronics in the cabin item within the airline's rules.

Incheon departure uses Terminal 1, but recheck it

Incheon Airport's current airline directory places Jeju Air in Terminal 1. The airport also warns that codeshares and operational changes can produce a different terminal, so confirm the e-ticket and live flight display before travel.

Jeju Air's current international guidance makes mobile boarding passes available from 24 hours to 1 hour 30 minutes before departure for eligible flights from Incheon. Some passengers and reservations are excluded. A mobile pass does not remove document or baggage checks, and anyone who cannot obtain one should use the airport counter.

The airline currently asks international passengers to reach the airport with time to spare and lists a 60-minute check-in deadline. Do not plan to arrive at that cutoff. Terminal 1 is large, security queues vary, and the 8:35 a.m. departure requires an early start from central Seoul.

Sendai Airport connects directly to the railway

Sendai Airport Station is connected to the terminal by a step-free bridge. The airport's access guide says the station ticket gates are about a two-minute walk from the bridge after leaving international arrivals.

Use the Sendai Airport Access Line timetable for the actual arrival day. The 10:30 a.m. scheduled landing is not a train connection time: immigration, baggage delivery and customs come first. Winter weather can also change road and rail conditions in Tohoku, so leave margin before a reserved onward train.

For the return, Sendai Airport says international airline counters generally open around two hours before departure. Jeju Air's own deadline still controls. The airport asks international passengers to be at the boarding gate 20 minutes before departure, while Jeju Air's current guidance says boarding closes 15 minutes before departure. Follow the earlier instruction shown on the boarding pass and at the airport.

Separate tickets at Incheon need recovery time

A nonstop removes one connection, but some travelers will still pair the route with another flight at Incheon. Keep the full itinerary on one ticket when possible. On separate reservations, baggage may need to be collected and checked again, and the second airline may not protect the trip if the first flight is late.

Incheon Airport currently lists Jeju Air at Terminal 1, while several major Korean carriers use Terminal 2. A terminal change adds transfer time. Check whether the arriving passenger must enter South Korea, meet entry requirements and move landside before buying a tight separate connection.

The same caution applies at Sendai. A reserved Shinkansen or domestic flight is not automatically protected by Jeju Air. Flexible onward transport is more useful than a theoretically fast connection with no recovery plan.

Mobile data for a Korea and Japan itinerary

The Japan and South Korea OpenSim eSIM is the direct fit for a trip using mobile data on both sides of this route. Travelers staying in only one country can compare the Japan or South Korea destination instead.

Allowances, validity periods, speed policies and top-up eligibility vary by package. Read the selected plan card before paying. Not every package can be topped up.

Mobile data can help with Jeju Air alerts, terminal directions, airport-train timetables and accommodation check-in. Install the eSIM on reliable Wi-Fi and save the itinerary and first-night address offline. An eSIM does not provide inflight Wi-Fi, change an airline baggage allowance or protect a separate ticket.

Ten questions about Jeju Air's Incheon-Sendai flights

When do Jeju Air's Incheon-Sendai flights start?

The planned first service is January 8, 2027. The airport release says the schedule depends on government applications and approval, so confirm the flight remains on sale for the exact date.

Which days will Jeju Air fly between Incheon and Sendai?

The announced operating days are Wednesday, Friday and Sunday in both directions. A date change can move a passenger onto a day without this nonstop, so review alternatives before accepting a voluntary change.

How can I identify the two new flights?

Flight 7C1631 is planned from Incheon at 8:35 a.m. to Sendai at 10:30 a.m. Flight 7C1632 is planned from Sendai at 11:30 a.m. to Incheon at 2:40 p.m. All times are local.

Is the Incheon-Sendai route already guaranteed to operate?

No. Jeju Air and Sendai Airport announced it, but their release makes the timetable subject to applications and regulatory approval. Airlines can also adjust future schedules after approval.

Does a Jeju Air BASIC fare include checked baggage?

Jeju Air's current international rules list no free checked bag with BASIC on this type of route. STANDARD currently includes 15 kg and BIZ LITE 30 kg, but the allowance printed on the booking is decisive.

Is Jeju Air's 15 kg allowance per bag or a total allowance?

For international routes outside Guam and Saipan, Jeju Air publishes a weight allowance. A single checked item must still stay within 158 cm combined dimensions and 32 kg. Check the booking and airline baggage tool before splitting the allowance across multiple items.

Can I use mobile check-in for the Incheon departure?

Eligible Jeju Air international departures from Incheon currently support a mobile boarding pass from 24 hours to 1 hour 30 minutes before departure. Passenger, route and service restrictions apply, and document checks may still be required.

Where should I check in at Incheon Airport?

Incheon Airport currently lists Jeju Air at Terminal 1. Confirm the terminal on the e-ticket and airport flight display because operating arrangements can change before January 2027.

How do I travel from Sendai Airport to the city?

The terminal connects directly to Sendai Airport Station by a step-free bridge. Check the Sendai Airport Access Line timetable after allowing for immigration, baggage and customs.

Is a separate connection at Incheon safe to book?

It depends on the terminal, entry rules, baggage handling and available recovery time. Separate tickets usually leave the passenger responsible for a missed onward flight, so avoid a tight connection and keep the journey on one reservation where practical.

Recheck the approval and timetable before travel

Before departure, confirm that the route has entered operation, the date still shows a nonstop, the terminal matches the e-ticket and the baggage allowance matches the fare. Recheck the Sendai Airport Access Line or Incheon transfer plan on the travel day, and keep a flexible backup for any separately booked connection.