Apply markup for type TravelAction. For example:
<main vocab=https://schema.org/ typeof=TravelAction>
<h1 property=name>Your travel tour to Z</h1>
<p property=description>zzzzzz</p>
<p><time property=startTime datetime=2018-05-29></time></p>
<p><time property=endTime datetime=2018-06-07></time></p>
<section property=fromLocation typeof=Place>
<h2>Start from</h2>
<div property=address typeof=PostalAddress>
<p property=streetAddress>The street address.</p>
<p property=postalCode>555 55</p>
<p property=addressRegion>The region</p>
<p property=addressLocality>The locality</p>
<p property=>Theproperty=addressCountry>The country (You can also provide the two-letter ISO 3166-1 alpha-2 country code https://en.wikipedia.org/wiki/ISO_3166-1 exempel:<meta property=addressCountry content=SE>)</p>
</div>
</section>
<section property=toLocation typeof=Place>
<h2>End to</h2>
<div property=address typeof=PostalAddress>
<p property=addressLocality>The locality</p>
<p property=addressCountry>The country<meta property=addressCountry content=AR> (You can also provide the two-letter ISO 3166-1 alpha-2 country code https://en.wikipedia.org/wiki/ISO_3166-1 )</p>
</div></section>
<section property=potentialAction typeof=TradeAction>
<h2 property=name>The Price</h2>
<p property=priceSpecification typeof=PriceSpecification>$<meta property=priceCurrency content=USD>99<meta property=price content=99></p>
</section></main>
Check out this markup on the Google tool ++ info about Currency code of ISO 4217.