SEA
Seattle–Tacoma International Airport
✈
BCN
El Prat De Llobregat
Distance
4,713 nm
Altitude
39,000 ft
Est. Duration
10h 49m
Route Information
Departure

SEA (SEA)

Distance

8,729.2 km (4,713.4 nautical miles)

Arrival

BCN (BCN)

Flight Time

635 minutes (10h 35m)

Flight Profile

Cruise Altitude: 39,000 ft (Flight Level 390)

Route calculated using great circle navigation

Turbulence comfort along route
Comfort score combines turbulence probability with intensity, higher means rougher
Smooth Light Moderate Severe
Your flight, stretch by stretch
Some bumps expected. 4 bumpier stretches, about 606 min in total.
  • 0:00-1:28 · Takeoff · light bumps (~88 min) Light movement. Drinks may ripple.
  • 1:28-1:57 · smooth
  • 1:57-7:45 · light bumps (~348 min) Light movement. Drinks may ripple.
  • 7:45-8:13 · moderate bumps (~28 min) Noticeable bumps. The seatbelt sign is likely on.
  • 8:13-10:35 · Landing · light bumps (~142 min) Light movement. Drinks may ripple.
💙
We know turbulence can feel scary - especially on long flights. This report is built for you: what bumps feel like, when they happen, and why they don't put the aircraft in danger. Many passengers feel exactly the same way.
Right now on your route
Live pilot reports from aircraft flying SEA → BCN
15 pilot reports along this route
15 / 15
Reporting smooth
0 / 15
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
ARP RCH471 5600N01421W 1244 F330 PIKIL 1247 5700N02000W MS48 278/106 KT 55142A DDL XXN 251244 F27A
1m ago
Smooth
ARP KLM661 6135N03525W 1241 F350 6101N04001W 1258 5901N05001W MS45 242/25 KT PHBKI QXT EUA 251241 L55A
4m ago
Smooth
ARP UAL973 6040N03433W 1240 F350 6001N04001W 1301 5801N05001W MS46 249/37 KT N13018 DDL XXF 251240 L55A
5m ago
Smooth
ARP ACA833 6249N03236W 1239 F340 6200N04000W 1306 5900N05000W MS48 247/17 KT CFNNW DDL KUS 251239 F43A
6m ago
Smooth
ARP EIN105 5615N01559W 1239 F360 5702N01959W 1302 5802N03000W MS50 273/110 KT EIELA DDL BLY 251240 J19A
6m ago
AI-powered flight briefing
17,000 data points analyzed · HIGH confidence
Your Flight

We analysed more than 17,000 data points along your route from Seattle–Tacoma International Airport, Seattle to El Prat De Llobregat, Barcelona.

Your Journey Beta

8 hours and 8 hours into the flight: Some moderate bumps expected.
The crew may adjust altitude or ask you to stay seated during these sections.
The rest of the flight should be smooth.

Your route takes you over the Rocky Mountains, crossing the North Atlantic Ocean, and over the Pyrenees – these areas can sometimes cause turbulence.

Smooth Flight

We're expecting smooth conditions throughout your flight. You can sit back and relax.

Takeoff

Takeoff should feel smooth with possible light bumps, with calm conditions around the airport.

Winds Aloft

Winds at cruising altitude are about 53 knots. These winds are favorable and may get you there up to 55 minutes early.

Landing

Landing should feel smooth with possible light bumps with typical approach conditions.

You're in Safe Hands

If you feel nervous at any point, remember that turbulence is expected, safe, and part of normal flying. The crew is monitoring everything, and the aircraft is built to handle far more than anything you will feel. Have a safe and calm flight.

Relaxation Exercises
ZeroTurb Index (ZTI): Powered by our turbulence prediction algorithm combining atmospheric Richardson Number, wind shear analysis, temperature gradients, and geomagnetic activity. Learn more
Live data from ECMWF global forecast models · 12 atmospheric pressure levels · Updated every 6 hours
Flight Timeline 10h 35min
Maximum turbulence expected per segment
Takeoff
Light
0:30-0:59
Light
0:59-1:28
Light
1:28-1:57
Smooth
1:57-2:26
Light
2:26-2:55
Light
2:55-3:24
Light
3:24-3:53
Light
3:53-4:22
Light
4:22-4:51
Light
4:51-5:20
Light
5:20-5:49
Light
5:49-6:18
Light
6:18-6:47
Light
6:47-7:16
Light
7:16-7:45
Light
7:45-8:13
Moderate
8:13-8:41
Light
8:41-9:09
Light
9:09-9:37
Light
9:37-10:05
Light
Landing
Light
Smooth
Light
Moderate
Severe
Longer bars indicate higher turbulence intensity. Values shown are the maximum for each time segment.
Airport conditions
Live weather at departure and arrival
SEA Seattle–Tacoma International Airport - Departure
Visibility
9 mi
Wind
6 kt (50°)
Sky
Overcast
Temperature
8°C
Conditions
VFR - Clear conditions, no delays expected
BCN El Prat De Llobregat - Arrival
Wind
7 kt (200°)
Sky
NSC
Temperature
21°C
Conditions
VFR - Clear conditions, no delays expected
Your flight details
Departure timing and aircraft information
Data sources & our approach
ZeroTurb's Custom Algorithm: Our proprietary ZeroTurb Index (ZTI) combines three meteorological indices weighted by their predictive accuracy - giving you transparent, passenger-focused turbulence probability instead of vague categories.

This forecast integrates data from:

Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.

Fly this route, calmly Game · Beta A calming mini-game. Glide SEA → BCN, with soft clouds where today's forecast shows bumpier air. Nothing to crash into.