यह एकतरफ़ा टिकट है; वह वापसी टिकट है।

Here, यह means this and वह means that.

So:

• यह एकतरफ़ा टिकट है = This is a one-way ticket
• वह वापसी टिकट है = That is a return ticket

A useful note: in Hindi, यह and वह can also mean he, she, it, this, that, depending on context. In this sentence, because they are pointing to tickets, the natural English translation is this and that.

Also, in everyday speech:

• यह is often pronounced more like yeh
• वह is often pronounced more like voh

Hindi often uses a different basic pattern from English.

This sentence is literally closer to:

• यह एकतरफ़ा टिकट है = This one-way ticket is
• वह वापसी टिकट है = That return ticket is

Hindi usually puts the linking verb है (is) at the end of the clause. So a very common Hindi pattern is:

[subject] + [description/noun] + है

Examples:

• यह किताब है = This is a book
• वह मेरा दोस्त है = That is my friend

So even though the word order looks different, it is a completely normal Hindi sentence structure.

Hindi normally does not use articles like English a, an, the.

So:

• यह एकतरफ़ा टिकट है can mean This is a one-way ticket
• Depending on context, it could also feel like This is the one-way ticket

Hindi usually leaves that distinction to context rather than using separate article words.

That is why you do not see a direct equivalent of a before ticket.

एकतरफ़ा means one-way.

It is built from parts that suggest the idea of one side / one direction:

• एक = one
• तरफ़ = side / direction

So एकतरफ़ा टिकट is a one-way ticket.

You may also see it written as एक तरफ़ा in some contexts, but एकतरफ़ा as one word is very common.

It can also be used more generally, not only for travel. For example, it can mean one-sided in a figurative sense too.

वापसी means return or coming back.

So:

• वापसी टिकट = return ticket

This is the ticket for coming back, not just going in one direction.

You may also meet वापस, which means back:

• मैं वापस आऊँगा = I will come back

So वापसी is the noun idea return, while वापस is more like the adverb back.

टिकट is a borrowed word in Hindi (from English ticket), and it usually stays the same in forms like this.

So:

• एकतरफ़ा टिकट
• वापसी टिकट

Both use टिकट unchanged.

Many borrowed nouns in Hindi behave this way in everyday usage. Hindi does have gender and number agreement in many places, but not every noun visibly changes form.

In practical terms, you can safely learn टिकट as a common invariable noun for most basic sentences.

है is the singular present form of the verb to be here, meaning is.

Each clause has a singular subject:

• यह ... है = This is ...
• वह ... है = That is ...

So है is correct in both.

If the subject were plural, you would usually use हैं instead:

• ये एकतरफ़ा टिकट हैं = These are one-way tickets
• वे वापसी टिकट हैं = Those are return tickets

It can also mean he, she, or that, depending on context.

For example:

• वह घर में है could mean He is at home, She is at home, or That is in the house, depending on the situation.

In your sentence, because वह is followed by वापसी टिकट, the meaning is clearly that:

• वह वापसी टिकट है = That is a return ticket

So Hindi often relies on context more than English does.

The semicolon separates two closely related statements:

• यह एकतरफ़ा टिकट है
• वह वापसी टिकट है

It shows a contrast between the two tickets: this one is one-way; that one is return.

In Hindi, you could also write them as:

• two separate sentences
• a comma in informal writing
• or connect them with a word like और if appropriate

But the semicolon works well here because the two clauses are parallel and closely linked.

A simple pronunciation guide is:

• यह = yeh
• एकतरफ़ा = ek-tar-faa
• टिकट = ti-kat or ṭi-kaṭ
• है = hai
• वह = voh
• वापसी = vaa-pa-see
• टिकट = ti-kat
• है = hai

So the full sentence can be read roughly as:

yeh ektarfaa ṭikaṭ hai; voh vaapsi ṭikaṭ hai

A couple of useful notes:

• फ़ in तरफ़ा represents an f sound.
• In casual speech, यह and वह are very often pronounced yeh and voh, even though the spelling is यह and वह.

That dot is called a nukta.

It changes the basic letter to represent a sound that entered Hindi through Persian, Arabic, and other language influence. Here:

• फ is traditionally an aspirated ph sound
• फ़ represents an f sound

So तरफ़ is pronounced with f, not with a strong ph sound.

In modern everyday writing, some people still write फ where others write फ़, especially in informal text, but फ़ is the more precise spelling for the f sound.

Yes. This version is correct and clear, but Hindi offers other natural ways too.

For example:

• यह एकतरफ़ा टिकट है और वह वापसी टिकट है।
  = This is a one-way ticket and that is a return ticket.

If the context is already clear, Hindi may also drop repeated words more easily in conversation, though the full version is best for learners.

Your original sentence is good because it is:

• grammatical
• balanced
• easy to understand
• useful for learning contrast between यह and वह