Boom Festival — festival guide

At a glance

Dates

28 Aug – 4 Sept 2027 (8 days)

Location

Unknown, Idanha-a-Nova, Portugal

Sound

Electronic

Tickets

€250 · 1 tier tracked

The story

Boom Festival is a 8-day electronic festival at Unknown in Idanha-a-Nova, Portugal. The August 2027 edition runs 28 Aug – 4 Sept 2027.

Everything happens at Unknown, in Idanha-a-Nova. Idanha-a-Nova is the base for the trip: it is where the affordable beds, the late trains and the after-parties are, and where prices climb fastest as the dates approach.

Boom Festival keeps the same calendar slot each year: August 2027 for this edition, opening on a Saturday and closing on a Saturday. It is a high-summer date, which is peak season for both travel and accommodation across the region. That slot matters for the budget — flights and rooms in Idanha-a-Nova are priced for the festival weekend, not the week around it, so shifting your arrival by a day often saves more than any ticket tier does.

What the trip costs from Paris

Door to door from Paris, a trip to Boom Festival works out at roughly €612 per person on the cheapest combination we track — a mid-priced weekend by the standards of our index.

The ticket is only 41% of that: the rest is getting there and sleeping somewhere, which is exactly the part most ticket sites leave out.

Cheapest travel we price is bus · 22h 13m each way, at €146 return.

Planning the trip, step by step

1. 1Book the ticket first: tiers at Boom Festival are sold in waves and the cheapest wave is gone long before the line-up is complete.
2. 2Then price the travel from Paris — Cinderella compares train, bus, car and flight for the same dates, and the cheapest option is not always the obvious one.
3. 3Reserve 9 nights rather than 8: the last night of a festival almost always ends after the last train home.
4. 4Follow Boom Festival on Cinderella to be emailed when a ticket price drops or a new tier opens.

Full line-up

Ordered as the poster reads it — headliners first, then most booked to least. Each name opens that artist's festival dates.

Past editions

Dates are the event's recurring calendar slot, so treat them as approximate — the organiser keeps the official archive.

• 2026

  28 Aug – 4 Sept 2026 (approx.)

• 2025

  28 Aug – 4 Sept 2025 (approx.)

• 2024

  28 Aug – 4 Sept 2024 (approx.)

Travel tips from Paris

• The site itself is Unknown, in Idanha-a-Nova.
• Book a bed in Idanha-a-Nova early — rooms around a festival sell out before the last ticket tier does.

• bus22h 13m · €146
• air5h 14m · €230