Plane tickets: http://www.skyscanner.com
Train tickets SEA: http://www.seat61.com
Prices to get fro anywhere to anywhere by any mean: http://www.rome2rio.com
Offline maps: Triposo app
Plane: Use the skyscanner widget on your phone or tablet to always keep an eye on flight prices. Low cost airlines usually charge you if you want to check in your baggage, but the good thing is that they usually don’t whey cabin baggage, so if you just make your backpack look small you can usually tase it with you without paying extra.
Another thing to keep in mind is that some times, budget airlines, will need you to print your plane ticket, because they don’t have counters at the airport.