Barcelona to Madrid: Flights and High Speed Rail

In just a few short days, on 5 October 2026, Vueling flight number VY1010 will be on its way to Madrid after taking off from Barcelona at 07:25. The roughly 485 kilometres between the two Spanish cities takes 1 hour and 25 minutes in flight time and has enough demand that Vueling decided to restart this service after having given up this route in March 2025. When this restart was announced over the summer, a number of news outlets covered it and commented on the decline of the high-speed rail connection between the two cities and the country’s high-speed service in general. I wanted to do some more digging myself.

What are the options?

To understand where Vueling fits in all this, I wanted to see the other flights between Barcelona and Madrid. The numbers are quite astounding; on a regular Monday you can find 14 Iberia flights from BCN to MAD starting at 07:00 with the last departure scheduled at 21:10. Add to this two existing Air Europa flights, at 11:50 and 20:30, and Vueling’s new service which departs at 07:25 and 18:35. That’s 18 flights in total, from Barcelona to Madrid alone.

Iberia uses its Airbus A320 and A321 on this service, the first with a capacity of 136-171 passengers, the second with a capacity of 172-200. For our calculations, lets meet at 172 maximum passengers per trip. Air Europa uses its Boeing 737 with a capacity of 189, and Vueling currently uses its Airbus A320, which has a capacity of 186. This brings the total number of passengers that could theoretically travel from Barcelona to Madrid by flight on a regular Monday to 3158.

Looking at the prices one month out from writing this, Iberia’s flights go for around 67 to 154 euros. Air Europa averages 84 euros, and Vueling comes in cheapest at 55 to 60 euros.

On this same Monday, high-speed trains from Barcelona to Madrid run from 05:40 to 20:20 by Renfe AVE, Iryo and Ouigo. Renfe AVE schedules the most trains¹, with 26 trips from Barcelona to Madrid; they are also priced the highest among the other rail operators, usually between 37 and 103 euros. Using the Siemens-built series 103 trainset, Renfe is able to carry up to 404 passengers. Next, Iryo runs 14 trips with prices ranging from 35 to 44 euros. They use the Frecciarossa 1000 trains with the capability of transporting up to 457 passengers. Lastly, Ouigo runs the fewest, with 5 trips and has the lowest fares, from 29 to 42 euros. They use the Alstom Euroduplex with a capacity of 509 passengers, the largest among the three. Across all three operators, the total number of passengers that could be transported from Barcelona to Madrid is 19447.² Six times more than what is possible with flights.

Looking at the options available, it seems trains would offer the most convenience. The higher frequency would mean there’s more likely to be a train around the time you need to depart or arrive, and the costs are generally lower or equivalent to the plane. Where the train might not be the best, however, is when it comes to duration of travel³. The flights take 1 hour 25 minutes, whereas the trains average 3 hours to 3 hours 40 minutes hub to hub. These times are slightly longer than they usually are with Adif, Spain’s rail infrastructure provider, imposing speed limits after the Adamuz rail crash this year.

We haven’t even covered the buses that go between these two cities, I will maybe leave that for another time.

Small note on sustainability

In terms of sustainability, using rail transportation is without a doubt less polluting than flying, especially short-haul flights. This was the idea backing the ban on short-haul flights in France between cities high-speed trains could cover within 2 and a half hours or less. The only exception to this was made for flights between CDG and other cities to serve connecting passengers, the understanding being these passengers might instead choose other travel hubs, making their journey more polluting, or so it goes. We’ve already seen that the capacity of trains is much higher than that of planes, so the increased number of passengers from fewer or no flights could be absorbed if the trains are not already at full occupancy. The 2.5-hour limit was chosen as an ideal-ish time, and any longer would pose too much of an inconvenience and push passengers towards other forms of transport like private vehicles.

Not only is rail more sustainable in terms of day-to-day operations, but taking into consideration the entire lifespan of the infrastructure and vehicles required, high-speed rail can still reach net-zero emissions:

Under a business-as-usual trip substitution scenario, the HSR gets net-zero 60 years after construction. With a short-haul flight ban, it occurs after 10 years. This advocates for generalising short-haul flight bans and investing in HSR infrastructure.

There’s a lot of existing papers and resources on this topic that I won’t hash out here. Not only because I’m not competent enough but also because it’s something that’s not even debatable.

Is high-speed rail usage actually declining?

I’m not going to beat around the bush; I wish I could answer this definitively, but this is an attempt at jotting down what I currently have in my notes.

In Q4 2025, before the Adamuz rail crash, high-speed rail passenger usage went up across Spain by 5.3% compared to Q4 2024. Despite this, the Madrid-Barcelona line saw demand fall by 13%, which comes out to 3.3 million passengers. The number of available seats only dropped by 4.4% when Renfe removed its budget Alvo offering as Iryo and Ouigo got capacity.⁴ Overall in 2025, high-speed rail saw a 12% increase compared to 2024, and the Barcelona-Madrid corridor saw a 1.7% decrease still. The Adamuz Rail crash hasn’t helped, as Q2 2026 has seen 1.2 million fewer passengers compared to the same period in 2025.

This is partly due to the reduced capacity on this line with the speed restrictions. It was only last year that the Minister of Transport and Sustainable Mobility, Óscar Puente, talked about the work that needed to be done to increase the speed of the Barcelona-Madrid corridor to allow for more train slots. This is far from what we have this year with the restrictions, and I hope the infrastructure is improved in the coming months to resume full service.

So it’s hard to say the decline is non-existent, but for the moment it doesn’t warrant alarm bells.

Further reading

This has been an exceptionally rambly post; it’s been festering in my notes for some time, and after reading the announcement of Vueling parroted by multiple new outlets, all citing CNMC, Spain’s National Commission on Markets and Competition, on the decline of high-speed rail, I thought it was time to post it. Finished or not. So, I will leave you with some further reading.

• Should short-haul flights be banned? A simple transportation network analysis by Pedro Cantos-Sanchez, Rafael Moner-Colonques, Alba Ruiz-Buforn and Jose J. Sempere-Monerris. This is an actual detailed look at what it would be like if short flights were banned in Spain, with examples of Barcelona, Madrid and Valencia.

• Replacing short-medium haul intra-European flights with high-speed rail: Impact on CO2 emissions and regional accessibility by Nicolò Avogadro, Mattia Cattaneo, Stefano Paleari and Renato Redondi. This article was quoted by many papers that I read, including the previous one. However, I was not able to access it freely and so have not read it, but I thought it would be worth a mention anyway. According to another paper I read, Avogadro et al’s work included surveying 27 European countries and found that, out of all short-haul air routes with alternative transport (allowing for 20% more time), France, Germany, the UK, Spain and Italy would be most affected, in that order, in reducing emissions.

• Barcelona-Madrid by train by The Man in Seat 61. If you are making this or any other long journey by train, I cannot recommend this site enough.