Portugal's south is the easiest warm-weather backpacking in Western Europe, and it still doesn't require a big budget if you dodge August. We did this route in early June: four nights in Lisbon, a Sintra day, then buses down the coast.
Lisbon: four nights minimum
Lisbon punishes rushed itineraries because the city is built on hills and everything takes longer and tastes better than planned. Dorm beds run 25-38 euros in 2026 — book ahead for weekends, the city fills fast now. Skip the queue for the number 28 tram and just walk Alfama at 9am before the day-trippers arrive; laundry hangs over the lanes and the fado bars are still shuttered and quiet. Buy a Viva Viagem card, load it with zapping credit, and the ferry to Cacilhas (about 1.60 euros) gets you grilled fish at the ramshackle riverside restaurants for half the Lisbon price with the whole skyline thrown in. The pastel de nata debate is eternal; our take is that Manteigaria at 1.40 euros wins on the crackle of the top layer, and we will not be taking questions.
Sintra without losing your mind
The train from Rossio station takes 40 minutes and costs about 2.40 euros each way. Sintra is genuinely worth it and genuinely overrun, so pick two palaces maximum. Pena Palace (about 14 euros online) is the technicolor one on every feed; Quinta da Regaleira's initiation well is the one that actually feels like a secret society built it. Go on a weekday, book timed tickets the night before, and walk downhill between sites instead of fighting for the 434 bus.
Down to Lagos
There's no direct train worth taking to the western Algarve, so grab a Rede Expressos or FlixBus coach from Lisbon's Sete Rios to Lagos: about 4 hours, 12-22 euros booked a few days out. Lagos is the backpacker capital of the Algarve, and honestly, lean into it. Dorms cost 22-35 euros, everyone you meet is walking to Ponta da Piedade at golden hour, and the water in the coves — Praia do Camilo, Praia Dona Ana — is that impossible glassy turquoise over pale sand. Kayak tours through the grottoes run about 35-45 euros; the free version is scrambling the cliff paths and swimming from cove to cove.
Sagres, the end of the world
An hour further west by local bus (around 4-5 euros), Sagres is where the crowds thin and the wind picks up. This was the edge of the known map for medieval Europe, and standing on the fortress cliffs at Cabo de São Vicente at sunset, watching the Atlantic slam the rocks 60 meters below while the lighthouse starts to turn, you get it. Sagres is also the Algarve's surf town — board and wetsuit rental about 25 euros a day, lessons around 40-50. One or two nights is right.
East to Faro and out
Bus back through Lagos and take the regional train along the coast to Faro (about 2 hours, 8 euros, no reservations needed). Faro gets skipped and shouldn't be: the walled old town is calm and cheap after Lagos, and the flat-bottomed ferries out to Ilha Deserta and Ilha da Culatra (5-10 euros return) drop you on Ria Formosa sandbar beaches with nothing on them but a lighthouse village and clam shacks. Faro's airport has budget flights all over Europe, which makes it the natural exit.
Costs and timing
May, June and late September are ideal — the sea is swimmable, the coast paths aren't ovens, and beds cost two-thirds of the August price. Daily budget: 45-60 euros covers dorms, coach hops, one sit-down seafood meal and a lot of pastéis. The single best money move in Portugal remains the prato do dia lunch: 8-11 euros for soup, a plate of grilled fish and a glass of wine, even one street back from the beach.
