Tri-Cities (PSC) – Seattle (SEA)

Distance

277 km

172 mi · 149 nm

Flight time

1 h 8 min / 1 h 1 min

Average gate to gate: PSC → SEA / back

Time difference

none

CO2 per passenger

63 kg

One way, economy, incl. RF (37 kg CO2 only)

Passengers / year

347,840

Aug 2025 – Jul 2026 · −3.8%

Flights / week

103

Both directions, average

Seats filled

78%

444,702 seats a year

Airlines nonstop

3

OO, QX, AS

Traffic: U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service), Aug 2025 – Jul 2026. Distance: WGS-84 ellipsoid. CO2: UK DESNZ 2026 factors. Sources

Airlines flying PSC–SEA nonstop

Both directions, Aug 2025 – Jul 2026. Airlines with at least one flight a month. U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service). Sources

Aircraft on this route

• Embraer ERJ-175 · 4,850 flights
• Boeing 737-800 · 184 flights
• Boeing 737-900ER · 151 flights
• Boeing B737 Max 900 · 115 flights
• Boeing B737 Max 800 · 22 flights
• Boeing 737-700/700LR/Max 7 · 16 flights
• Boeing 737-900 · 2 flights
• Airbus Industrie A319 · 1 flight

Also carried: 27 tonnes of freight and 0 tonnes of mail a year (passenger and cargo flights).

Punctuality

On time

86%

Arrived within 15 min of schedule

Average delay

11 min

Late arrivals count, early ones as 0

Cancelled

1%

Flights counted

3,453

Aug 2025 – Jul 2026

Delay minutes by cause: airline 53% · aircraft arriving late 19% · air traffic system 8% · weather 20% · security 0%.

Both directions, Aug 2025 – Jul 2026. BTS Reporting Carrier On-Time Performance (US domestic flights of the larger US airlines). Sources

Every airport pair between Tri-Cities and Seattle

Kilometres. Linked numbers have a page of their own. All Seattle airports