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AS123 Flight Information & Schedule

Alaska Airlines · Seattle–Tacoma International Airport (SEA) to Narita International Airport (NRT)

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AS123 Seattle–Tacoma International Airport to Narita International Airport nonstop flight: schedule, airports, aircraft and travel guide.

AS123 Flight Overview

AS123 is operated by Alaska Airlines and connects Seattle–Tacoma International Airport (SEA) and Narita International Airport (NRT). Scheduled departure: 2026-10-29 12:55 (UTC-07:00); scheduled arrival: 2026-10-30 15:25 (UTC+09:00).

AirlineAlaska Airlines
Flight numberAS123
RouteSEA to NRT
Scheduled duration10 hr 30 min

Seattle to Narita Route Information

AS123 is a nonstop international flight from Seattle–Tacoma International Airport (SEA) to Narita International Airport (NRT). Use the information below to plan your journey.

Route distanceApprox. 7,674 km
Scheduled flight time10 hr 30 min
Time difference960 min
Flight typeInternational
01

Departure

Scheduled departure: 2026-10-29 12:55 (UTC-07:00). Confirm airport transport and terminal opening hours in advance.

02

Arrival

Scheduled arrival: 2026-10-30 15:25 (UTC+09:00). Arrange pickup, hotel and onward transport for the arrival date.

03

Time zones

Departure: Seattle (UTC-07:00); arrival: Narita (UTC+09:00).

AS123 On-time Performance & History

Methodology

94%Arrival on-time rate
Sample flights94 (flights)
Average departure delay36 min
Average arrival early5 min
Cancllation rate0%
Longest delay-
Early arrivals56%

Historical statistics are for reference only and do not predict future flight performance.

Aircraft, Cabin & Services

Based on currently published aircraft and cabin information; the operating aircraft may change.

Published aircraft type

Boeing 787

Economy 31 in; Business 76 in

Seat layout300

Business 30 · Economy 270

Business Class1-2-1

76 in

Seat configuration depends on the operating aircraft

Economy Class3-3-3

31 in

MealsMeal included

Inflight entertainmentOn-demand entertainment

Inflight Wi-FiWi-Fi is unavailable

Availability and fees depend on the flight

PowerBusiness: USB port and power outlet; Economy: USB port and power outlet

BassinetAvailable

Accessibility-

AS123 Airports

Terminals follow the published schedule; check official airline channels for same-day gates and operations.

Seattle–Tacoma International Airport Departure & Narita International Airport Arrival Guide

Departure date: 2026-10-29. Terminal and arrival information helps plan your journey.

SEA

Departing from Seattle–Tacoma International Airport

AS123 is scheduled to depart from . Allow time for international check-in, baggage drop, security and immigration.

NRT

Arriving at Narita International Airport

Scheduled arrival is at T2. After immigration, take the MRT, taxi, ride-hailing service or airport bus to the city.

+1

Planning your arrival

Scheduled arrival: 2026-10-30 15:25. Use the arrival date when booking hotels and pickup services.

Flight Changes, Cancellations & Missed Flights

If the schedule or aircraft changes, follow the booking channel and operating carrier rules.

01

Schedule changes

After an airline or booking-platform notice, confirm the new date, terminal and connecting transport.

02

Cancellation and changes

Refund, rebooking and involuntary-change rules depend on the booking channel, fare conditions and airline notice.

03

Missed flight

If you may not reach the airport on time, contact the booking channel or airline quickly to protect later sectors.

Check-in, Baggage & Entry Tips

International check-in deadlines, baggage allowance and entry requirements may vary by fare and traveller.

01

Arrive early for check-in

Arrive at least 3 hours before departure. Counter opening times and online check-in rules follow Seattle–Tacoma International Airport guidance.

02

Check baggage allowance

Checked and carry-on baggage allowances depend on cabin, fare rules and membership tier. See the baggage terms in your booking.

03

Prepare entry documents

Before departure, check passport validity, visa or visa-free eligibility, andNarita International Airport’ latest arrival declaration requirements.

What should I check before flying AS123?

01

Check the departure date

For an overnight flight, check the departure date on your ticket and plan airport transport in advance.

02

Confirm the operating carrier

Follow the airline rules shown in your booking for check-in and checked baggage.

03

Check boarding information

Gates and operating times may change; follow airline notices and airport displays.

Popular route recommendations

AS123 Frequently Asked Questions

Which airline operates this flight?

AS123 is operated by Alaska Airlines.

Where does it depart and arrive?

Seattle–Tacoma International Airport (SEA) → Narita International Airport (NRT).

What are the departure and arrival times?

Scheduled departure 12:55, arrival 15:25 · 10 hours 30 minutes.

Which terminal is used for check-in?

Departure terminal No data, arrival terminal T2. Check-in, gate and baggage belt are announced on the day.

Are meals and inflight entertainment available?

Meals: Meal included. Inflight entertainment: On-demand entertainment.

Explore This Route

Departure airportFlights from Seattle–Tacoma International Airport
Arrival airportNarita International Airport information
Operating airlineAlaska Airlines information