Buscamos una página fiable para reservar el vuelo, aunque el billete sea un poco más caro.

Here página most naturally means a website/web page. In everyday Spanish, especially online, una página is often short for una página web.

So in this sentence, Buscamos una página fiable... is best understood as:

• We’re looking for a reliable website...

not a literal paper page.

Yes. Fiable means reliable, trustworthy, or dependable.

In Spain, fiable is very common for websites, products, information, sellers, etc.:

• una fuente fiable = a reliable source
• una web fiable = a reliable website

You may also hear:

• de confianza = trustworthy
• confiable = reliable/trustworthy

But in Spain, fiable is usually the most natural choice here.

It can mean both, depending on context.

Spanish often uses the simple present where English might prefer either:

• we look for
• we are looking for

So Buscamos una página fiable... can mean:

• We’re looking for a reliable website...
• or, less likely out of context, We look for a reliable website...

In this sentence, the natural English translation is probably We’re looking for...

Because in Spanish, adjectives often come after the noun.

So:

• una página fiable = a reliable website
• literally, a website reliable

This is the normal position for a descriptive adjective like fiable.

Putting the adjective before the noun is much less common here and would sound marked or literary.

Because para + infinitive is a very common way to express purpose in Spanish.

So:

• para reservar el vuelo = to book the flight / in order to book the flight

This is exactly like saying what the website is for.

More examples:

• Necesito gafas para leer. = I need glasses to read.
• Tengo dinero para pagar. = I have money to pay.

So para reservar means for booking or to book.

They are related, but not the same thing:

• el vuelo = the flight
• el billete = the ticket

So:

• reservar el vuelo = book the flight
• el billete sea más caro = the ticket is more expensive

This is natural because you book a flight, but the ticket/fare is what has a price.

In English, we often blur these ideas a bit, but Spanish is being more precise here.

Because aunque can trigger the subjunctive when the speaker is presenting something as uncertain, hypothetical, or not being asserted as a fact.

Here:

• aunque el billete sea un poco más caro

means something like:

• even if the ticket is a little more expensive
• although the ticket may be a little more expensive

The subjunctive sea shows that the speaker is not focusing on the ticket’s price as a confirmed fact; it is more of a concession.

Yes, that can also be correct, but the meaning changes slightly.

• aunque el billete sea...
  = even if the ticket is a bit more expensive / whether or not it turns out to be

• aunque el billete es...
  = although the ticket is a bit more expensive

So:

• subjunctive = less factual, more hypothetical or non-committal
• indicative = presented as a known fact

In your sentence, sea is a very natural choice because the speaker is saying reliability matters, even if the price ends up being slightly higher.

It means a little more expensive.

Breakdown:

• caro = expensive
• más caro = more expensive
• un poco más caro = a little more expensive

So un poco softens the comparison.

Compare:

• más caro = more expensive
• un poco más caro = a bit more expensive
• mucho más caro = much more expensive

Because Spanish usually forms comparisons with más + adjective.

So:

• caro = expensive
• más caro = more expensive

Unlike English, Spanish does not usually change the adjective itself the way English does with cheap → cheaper or expensive → more expensive. Spanish normally just adds más:

• rápido → más rápido
• seguro → más seguro
• fiable → más fiable

Yes. In Spain, billete is a very common word for a travel ticket:

• billete de avión = plane ticket
• billete de tren = train ticket

In other Spanish-speaking countries, you may also hear:

• boleto
• pasaje
• tiquete

But for Spanish from Spain, billete is completely standard.

Not exactly.

• reservar el vuelo = to book/reserve the flight
• comprar el billete = to buy the ticket

Sometimes in real life those happen together, especially online, but they are not identical in meaning.

Reservar focuses on making the booking.
Comprar focuses on paying for the ticket.

That is why this sentence can talk about reservar el vuelo and then mention that el billete may be more expensive.

Because aunque el billete sea un poco más caro is a subordinate clause added after the main idea, and the comma helps separate that concessive idea.

Main clause:

• Buscamos una página fiable para reservar el vuelo

Added concession:

• aunque el billete sea un poco más caro

In writing, that comma is very natural and helps readability. You may sometimes see variation with short clauses, but here the comma is standard and useful.

Yes, definitely. In Spain, web is very common in this context.

So you could say:

• Buscamos una web fiable para reservar el vuelo...

That sounds very natural too.

The difference is mostly style:

• página = website/web page
• web = web / website

In modern everyday Spanish, web is often the most direct word for this idea.