Deeper Money-Saving Tips for Korea — Flights to Souvenirs

Flights are often relatively cheaper if you book on a Tuesday afternoon through Wednesday, and booking 3–8 weeks ahead usually beats peak-season prices — use Skyscanner's 'whole month' fare view to scan for cheap dates in advance.
For intercity travel, compare SRT against KTX — the same route can price differently depending on the operator, and both apps regularly release discounted 'special fare' seats. These tend to sell out fast, so book as soon as your plans are confirmed rather than waiting until the last minute.
Skip Starbucks for local low-cost chains like Mega Coffee, Compose Coffee, or Paik's Coffee — an americano runs about 1,500–2,000 KRW and the quality holds up just fine.
For souvenirs, check convenience stores and Daiso — Daiso is a flat-price variety store that's easy for tourists to browse, with cheap trinkets, cosmetics, and snacks all in one stop.
An eSIM is much cheaper than carrier roaming — compare country rates on apps like Airmobile or Airalo and install via QR code beforehand so you have data the moment you land.
At 'Tax Free' stores, ask for 'instant refund' instead of the standard airport tax refund — some stores deduct the VAT right at checkout instead of making you claim it later at the airport.
Water and snacks are often cheaper via convenience store 1+1 promotions than at a big supermarket — check the CU, GS25, or Seven Eleven apps for what's currently on offer before you go.