About 22 miles. Thirty minutes clear, an hour or more at peak, and — unusually for an American airport — the light rail option is now genuinely competitive.
Bellevue's transit connection has changed significantly in recent years, which is why a lot of the advice you will find online is out of date.
The routes
By car, the standard route is I-405 north from Sea-Tac, or I-5 north to I-90 east across Mercer Island. Both are subject to Puget Sound congestion, which is heavy in both directions at peak.
By rail, Link light rail serves Sea-Tac directly from the SeaTac/Airport station, connected to the terminal by a pedestrian walkway. Sound Transit's network now extends across Lake Washington to Bellevue and the Eastside, which makes an airport-to-Bellevue rail trip possible in a way it was not a few years ago.
Check Sound Transit's current network map and journey planner before you travel — the Eastside network has been expanding in stages and the exact routing and journey time depend on which segments are open. That verification takes two minutes and it is worth doing rather than relying on any guide, including this one.
The numbers
| Option | Journey time | Predictable? | Best for |
|---|---|---|---|
| Link light rail | ~50–70 min | Yes | Light luggage, peak hours, downtown Bellevue |
| Shared shuttle | 45–75 min | Somewhat | Luggage, hotels |
| Rideshare / taxi | 30 min – 1 hr 10 | No | Speed, groups, odd hours |
| Rental car | 30 min – 1 hr 10 | No | When you need a car on the Eastside |
When driving is bad
Peak on I-405 northbound runs roughly 3:00 to 7:00 p.m., and southbound 6:00 to 9:30 a.m. Within those windows a 30-minute trip becomes an hour or more.
The Puget Sound region has some of the worst congestion per capita in the country, and I-405 is its spine on the Eastside. There are express toll lanes on portions of I-405 which buy you predictability rather than raw speed — worth it for an airport run with a deadline, unnecessary for a relaxed arrival.
The I-90 and SR 520 bridges across Lake Washington are the other pressure point if you route via I-5. Both are chokepoints with no alternatives.
The deadline asymmetry
Going to Sea-Tac has a deadline. Leaving it does not.
Outbound from Bellevue, this matters more than usual because Sea-Tac is a busy airport with long security queues at peak times. A trip that takes 30 minutes at 10 a.m. takes over an hour at 4 p.m., and the security line is longer too.
Rule of thumb: for a flight departing between 6 a.m. and 9 a.m., leave Bellevue before 4:30 a.m. and check that light rail is running at that hour — it may not be. For an afternoon flight, leave before 2:30 p.m. or budget an extra 45 minutes.
Inbound, take whichever option is cheapest. A wait costs you nothing but time.
First and last service
This is the single most useful thing to check and the thing most people skip.
Light rail does not run 24 hours. For a very early departure or a very late arrival, the train may simply not be an option, and discovering that at 4 a.m. is a bad way to start a trip.
Check Sound Transit's first and last train times for your specific day — weekend schedules differ from weekday — before you plan around rail.
Do you need a car in Bellevue?
Often not, and it is worth asking before you book one.
Downtown Bellevue is compact and walkable, with hotels, offices and the shopping district within a short radius. If your trip is downtown Bellevue and downtown Seattle, transit covers it.
If your trip involves Redmond, Kirkland, Issaquah or anywhere in the wider Eastside — or the mountains — rent the car.
How to choose
Downtown Bellevue, light luggage, normal hours → Link light rail. Predictable and cheap.
Real luggage or a hotel drop → Shared shuttle.
Group of three or more → Rideshare; the split changes the maths.
Very early or very late flight → Check first and last train times. If rail does not cover your hour, rideshare.
Continuing to the Eastside or the mountains → Rent at the airport.
Peak hour, hard deadline → Rail, or a car using the I-405 express toll lanes.
Weather
Rain is the constant and it is rarely dramatic, but I-405 at capacity degrades disproportionately when wet.
Winter snow and ice are infrequent and disruptive out of proportion to the amount. The region has limited equipment and drivers have limited practice. A snow event affects the roads far more than the rail, which is the strongest single argument for the train on a bad-weather day with a flight to catch.
Fog in the low-lying areas near the water is common in autumn mornings and can affect flights as well as the drive.
Before you leave
Twenty-two miles with a flight at the far end, on a corridor where I-405 can double your journey time without warning.
BoardSpy tells you before you leave what I-405 actually looks like right now and whether today is a day the train wins — with live weather on the route and an alert when a fifteen-minute earlier departure protects your flight.
Related BoardSpy guides
Frequently asked questions
How far is Seattle Airport to Bellevue?
About 22 miles. Driving is about 30 minutes clear and an hour or more at peak on I-405. Link light rail is typically about 50–70 minutes. Pattern estimates, not live times.
Is Link light rail a good option from Sea-Tac to Bellevue?
Yes for light luggage, peak hours, and downtown Bellevue. Sound Transit's network now extends across Lake Washington to the Eastside. Check the current map and first/last trains — service does not run 24 hours.
When is I-405 worst for an airport run?
Northbound roughly 3:00–7:00 p.m. and southbound 6:00–9:30 a.m. Express toll lanes buy predictability on an airport deadline. The I-90 and SR 520 bridges are the other chokepoints if you route via I-5.
Does light rail run early enough for a morning flight from Bellevue?
Not always. For a flight between 6 a.m. and 9 a.m., leave Bellevue before 4:30 a.m. and confirm the first train. Weekend schedules differ from weekday.
Do you need a rental car in Bellevue?
Often not for downtown Bellevue and downtown Seattle. Rent if the trip involves Redmond, Kirkland, Issaquah, the wider Eastside, or the mountains.
References
Posted signs and operator timetables override this guide. Drive-time windows are pattern estimates, not measured figures for today.
- Sound Transit — Link light rail at SeaTac/Airport and Eastside network maps, first and last trains.
- BoardSpy data sources — How leave-time recommendations use a saved route (limits disclosed).