Transport Mode: Air
- Companies: American Airlines, Delta Airlines
 - Duration: Approximately 6 hours 30 minutes (including layovers)
 - Distance: 1,600 miles (2,575 km)
 - Costs: Approximately €300 - €450 (depending on the season and availability)
 - Roads/Routes: Not applicable
 
Pro Tip: Book your flights at least 3 weeks in advance to secure the best rates and consider flying mid-week to avoid weekend surcharges.
For the overall journey, it is recommended to fly from San Diego International Airport (SAN) to Billings Logan International Airport (BIL) and then rent a car for the remaining 4-hour drive to Sidney, MT. This option combines efficiency and reliability.
Transport Mode: Road Trip
- Companies: N/A
 - Duration: Approximately 19 hours
 - Distance: 1,200 miles (1,931 km)
 - Costs: Gas costs can range around €150 - €200, plus potential overnight lodging (€50 - €100 per night if needed).
 - Roads/Routes: Take I-15 N from San Diego, continue on I-15 N, then take I-90 E towards Sidney.
 
Pro Tip: Opt for a scenic stop at Glacier National Park along the way, which adds a breathtaking experience to your long drive.
While a road trip offers flexibility and adventure, keep in mind the long travel time. Ensure to plan for rest stops, meals, and fuel along the route.