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Brussels skyline — flights from Rome from €16, cheapest in December

Rome to Brussels: buy now or wait?

Typical one-way fare Rome→Brussels: €20 (median of 44 daily lowest fares we tracked); under €17 is a good price; cheapest month: December; book 42–55 days ahead.

Buy now FareScore 66/100
usually €20 €16 Today's best fare

Cheaper than 66% of what we have seen

16 Dec Ryanair Direct
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All fares Rome → Brussels

Cheapest first. Every price is live and goes straight to booking.

What the history says

Prices recorded 620
Typical price €20
Lowest we saw €15
You save today €4

Based on 620 prices we recorded on this exact route, compared against the same departure month.

Best booking window

42–55 days — is when this route has been cheapest to book: €29 typical, on 161 observations. That is about €32 less than booking in the last two weeks.

Cheapest months to fly to Brussels

December €29 272 observations
November €34 230 observations
January €42 21 observations

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 (110,945 flights on 21,717 routes, 2026-06-14 to 2026-11-10), that window had the smallest average premium over each flight's lowest fare: +16.3%, against +48.8% in the last 3 days.
Are flights getting more expensive?
Not right now. The Piratefly monthly Fare Index stands at 98.5 in 2026-11 (month in progress), against 100 in 2026-08: comparable flights are 1.5% cheaper than then, measured on the same routes month to month.
Are domestic flights cheaper than international flights?
Yes. The median one-way fare on a domestic route was €121.25, against €160 for international flights within the same continent and €269 for intercontinental ones (79,553 routes, fares observed 2026-06-14 to 2026-11-10).

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