How far is Fort Casey, WA from Flagstaff, AZ?
The driving distance from Fort Casey, WA to Flagstaff, AZ is about 1392.6 miles (2241.1 km), with a travel time of about 25h 47m by car.
- The straight-line flight distance is about 1058.9 miles (1704.1 km).
- For a round trip, plan for roughly 51h 35m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM PDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 25h 47m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Minidoka County, Idaho, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy
Sunny
Driving Route Map
The map below follows the saved road route between Fort Casey and Flagstaff.
Turn-by-Turn Driving Directions
Step-by-step road directions between Fort Casey and Flagstaff.
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1
Start on the route
25 m · 11 sec
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2
Turn left onto Engle Road
2874 ft · 2 min · Engle Road
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3
Continue on State Route 20
3.3 mi · 5 min · State Route 20
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4
Turn right onto State Route 525
22 mi · 33 min · State Route 525
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5
Continue on 2
125 m · 9 sec · 2
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6
Turn right onto Ferry Dock
61 m · 11 sec · Ferry Dock
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7
Continue on Mukilteo-Clinton Ferry
3 mi · 20 min · Mukilteo-Clinton Ferry
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8
Continue straight
2190 ft · 2 min
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9
At the end of the road, turn left onto Mukilteo Speedway
1.9 mi · 5 min · Mukilteo Speedway
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10
Turn left onto 84th Street Southwest
2113 ft · 44 sec · 84th Street Southwest
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11
Turn right onto Paine Field Boulevard
1.3 km · 58 sec · Paine Field Boulevard
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12
Turn slight left onto Mukilteo Speedway
5.8 mi · 9 min · Mukilteo Speedway
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13
Continue straight
1.4 mi · 2 min
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14
Keep slight right
17.1 mi · 21 min
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15
Take the exit slight right toward I 90: Spokane, Seattle
2527 ft · 1 min
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16
Keep slight left to continue on I 90 East: Spokane
2797 ft · 1 min
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17
Merge slight left
100.5 mi · 1 hr 52 min
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18
Take the exit slight right toward I 82 East, US 97 South: Yakima
37.8 mi · 43 min
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19
Keep slight left
44.7 mi · 48 min
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20
Take the exit slight right toward SR 22 to SR 221: Mabton, Paterson
1712 ft · 45 sec
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21
Turn left onto Wine Country Road
572 ft · 17 sec · Wine Country Road
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22
Turn left onto State Highway 22
2961 ft · 57 sec · State Highway 22
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23
Turn left
26 mi · 31 min
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24
Turn left onto Lewis and Clark Trail Highway
13.5 mi · 16 min · Lewis and Clark Trail Highway
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25
Take the ramp right toward I 82 East, US 395 South: Pendleton
1705 ft · 42 sec
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26
Merge slight left onto McNary Highway
1.5 mi · 2 min · McNary Highway
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27
Take the exit slight right toward US 395 south, US 730: Umatilla, Hermiston, Irrigon
912 ft · 22 sec
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28
Keep slight left to continue on US 395 south, US 730: Umatilla, Hermiston, Irrigon
52 m · 11 sec
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29
Turn left onto Columbia River Highway
1.3 km · 57 sec · Columbia River Highway
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30
Turn right onto Umatilla-Stanfield Highway
3.8 mi · 4 min · Umatilla-Stanfield Highway
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31
Continue on North 1st Street
2864 ft · 44 sec · North 1st Street
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32
Turn left onto East Theater Lane
1368 ft · 41 sec · East Theater Lane
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33
Turn right onto Northeast 4th Street
1.6 mi · 3 min · Northeast 4th Street
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34
Turn left onto Umatilla-Stanfield Highway
3.2 mi · 4 min · Umatilla-Stanfield Highway
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35
Continue on North Main Street
2 mi · 2 min · North Main Street
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36
Continue on Umatilla-Stanfield Highway
1.4 mi · 2 min · Umatilla-Stanfield Highway
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37
Take the exit left toward US 395 North: Stanfield
2590 ft · 1 min
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38
Merge slight left onto Old Oregon Trail Highway
215.2 mi · 3 hr 48 min · Old Oregon Trail Highway
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39
Continue on Idaho Medal of Honor Highway
1.1 km · 48 sec · Idaho Medal of Honor Highway
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40
Continue on Vietnam Veterans Memorial Highway
21.7 mi · 25 min · Vietnam Veterans Memorial Highway
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41
Keep slight right to continue on Vietnam Veterans Memorial Highway
172.3 mi · 2 hr 43 min · Vietnam Veterans Memorial Highway
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42
Take the exit slight right
134.8 mi · 2 hr 8 min
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43
Keep slight left to continue on Veterans Memorial Highway
27.4 mi · 29 min · Veterans Memorial Highway
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44
Keep slight left to continue on Veterans Memorial Highway
8.2 mi · 9 min · Veterans Memorial Highway
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45
Keep slight left to continue on Veterans Memorial Highway
210.4 mi · 3 hr 30 min · Veterans Memorial Highway
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46
Take the exit slight right toward SR 20: Panguitch, Kanab
1922 ft · 55 sec
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47
Turn left
20.5 mi · 25 min
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48
At the end of the road, turn right
9.2 mi · 11 min
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49
Continue straight
1.4 km · 2 min
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50
Turn left onto Center Street
6.8 mi · 8 min · Center Street
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51
Keep slight right
23.3 mi · 28 min
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52
Continue straight
37 mi · 50 min
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53
Continue on 100 East
1828 ft · 59 sec · 100 East
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54
Turn left onto 300 South
72.4 mi · 1 hr 27 min · 300 South
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55
Continue on Highway South
1.7 mi · 3 min · Highway South
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56
Enter the roundabout and take exit 2 toward US 89 South
49 m · 3 sec
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57
Exit the roundabout onto US 89 South
81.1 mi · 1 hr 37 min
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58
Enter the roundabout and take exit 2 toward Cameron–Bitter Springs Highway
47 m · 3 sec · Flagstaff-Cameron Highway
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59
Exit the rotary onto Flagstaff-Cameron Highway
37.9 mi · 45 min · Flagstaff-Cameron Highway
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60
Continue on US Highway 89
6.4 mi · 9 min · US Highway 89
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61
Continue on Flagstaff-Cameron Highway
2.3 mi · 4 min · Flagstaff-Cameron Highway
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62
Continue on Flagstaff-Valle Highway
1263 ft · 31 sec · Flagstaff-Valle Highway
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63
Continue on East Santa Fe Avenue
2175 ft · 47 sec · East Santa Fe Avenue
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64
Continue on East Route 66
3.5 mi · 7 min · East Route 66
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65
Continue on East Historic Route 66
1002 ft · 23 sec · East Historic Route 66
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66
Arrive at your destination
0 m · 1 sec · West Historic Route 66
Car Route Details
A richer read on the saved driving route between Fort Casey and Flagstaff.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Old Oregon Trail Highway
Merge slight left onto Old Oregon Trail Highway
215 mi · 03h 48m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Cloudy leaving Fort Casey and Sunny near Flagstaff.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Fort Casey to Flagstaff?
The road trip is about 1392.6 miles (2241.1 km) and usually takes 25h 47m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Heyburn is a useful midpoint, sitting about 695.9 miles from Fort Casey and 696.6 miles from Flagstaff.
How much longer is the road route than the straight-line distance?
The direct path is about 1058.9 miles (1704.1 km), while the road route adds roughly 333.7 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 7:30 AM PDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $267.08 one way or $534.15 round trip. Estimated CO2 is about 436.7 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around Fort Casey and Sunny near Flagstaff.
Stop Ideas Near Heyburn
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Heyburn.
Twin Falls, Idaho
Flight Path Map
This map shows the direct air route between Fort Casey and Flagstaff. Straight-line distance: 1058.91 mi (1704.15 km).
#1 Fort Casey
Situated on the western shore of Whidbey Island in Island County at an elevation of 10 feet, this site occupies a strategic position overlooking Admiralty Inlet at the entrance to Puget Sound.
| Population | 0 |
| Coordinates | 48.1642600, -122.6787800 |
| Altitude | 3 |
| Country | United States |
#2 Flagstaff
The most populous city in Coconino County, Arizona.
| Population | 73,939 |
| Coordinates | 35.1980700, -111.6512700 |
| Altitude | 2104 |
| Country | United States |
End: Flagstaff (-111.65127, 35.19807)
Estimated Travel Time
Distance: 2241 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 46h 23m |
| 40 mph (64.37 km/h) | 34h 48m |
| 50 mph (80.47 km/h) | 27h 51m |
| 60 mph (96.56 km/h) | 23h 12m |
| 70 mph (112.65 km/h) | 19h 53m |
| 80 mph (129 km/h) | 17h 22m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.44 | $267.08 | $534.15 |
| Mid-grade | $5.72 | $281.03 | $562.06 |
| Premium | $5.98 | $293.71 | $587.42 |
| Diesel | $7.29 | $358.33 | $716.66 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Washington · Oct 15, 2026