London to Cardiff: buy now or wait?
Typical one-way fare London→Cardiff: €63 (median of 27 daily lowest fares we tracked); under €54 is a good price; cheapest month: October; book 0–13 days ahead.
Cheaper than 74% of what we have seen
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All fares London → Cardiff
Cheapest first. Every price is live and goes straight to booking.
What the history says
Based on 273 prices we recorded on this exact route, compared against the same departure month.
Best booking window
0–13 days — is when this route has been cheapest to book: €89 typical, on 124 observations.
Cheapest months to fly to Cardiff
Booking tips from our fare data
- How far in advance should you book a flight?
- Book 1.5–2 months before departure. Tracking the same flights at every lead time (107,477 flights on 21,208 routes, 2026-06-14 to 2026-11-09), that window had the smallest average premium over each flight's lowest fare: +16.4%, against +48.7% in the last 3 days.
- Is it cheaper to book flights months in advance?
- Not much. Booking 2–3 months ahead cost on average 21.1% more than the same flight's lowest fare, more than at 1.5–2 months (+16.4%). On 28,935 flights seen both 2–3 months and 3–4 weeks out, the early fare was higher 44.9% of the time: a coin toss.
- What is the cheapest month to fly?
- November 2026. Comparing each route's fares month by month (booked 8–60 days ahead), November 2026 departures were -1.3% against the route's own median, while January 2027 was the dearest at +24.2%. Covers September 2026, October 2026, November 2026, December 2026, January 2027; fares observed 2026-06-14 to 2026-11-09.
Price drops on Telegram
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