New Trip Editorial Department Last updated: 2026.07.09

How Many Suitcases Should You Bring? A Guide to Recommended Combinations Based on Travel Companions and Scenarios

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"When traveling, how many suitcases should I bring?"
If you're traveling alone, it's usually an easy decision, but for couples or family trips, many people wonder whether to consolidate everything into one suitcase or have one per person.

 

In conclusion, there's no single "right" answer regarding the number of suitcases.

What's important is to choose a combination that's easy to carry, considering the number of travelers, length of stay, mode of transportation, amount of luggage, and age of children.

 

In this article, from the perspective of the New Trip editorial department,

we will clearly explain the recommended number of suitcases for different travel patterns and key points to consider when making your choice.

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Table of Contents

1. There is no "correct" number of suitcases

2. How many suitcases? Recommended combinations based on travel patterns

3. Factors to Consider When Deciding on the Number of Suitcases

4. Tips for Reducing the Number of Suitcases

5. Recommended New Trip Suitcase Combinations for Travel

6. Summary

7. Frequently Asked Questions (FAQ)

一、スーツケースの数に「正解」はない

The number of suitcases you need isn't just determined by "how many people are traveling."

For example, even for the same family of three,

the optimal number of suitcases will vary depending on whether you're traveling by car or train, if the children are young,

or if they are old enough to carry their own luggage.

 

Additionally, if you plan to buy a lot of souvenirs at your destination, or if you have a lot of bulky luggage like winter clothes,

you need to choose your luggage with the return journey in mind, rather than just the outbound.

 

In other words, instead of assuming "one suitcase for two people" or "two suitcases for four people,"

it's important to consider your travel style.

First, let's look at recommended combinations for common travel patterns.

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二、スーツケースは何個？旅行パターン別おすすめ組み合わせ

First, let's check the list.

旅行パターン おすすめの組み合わせ 向いている人
一人旅 2〜4泊 Sサイズ×1 荷物が少ない、機内持ち込みしたい人
夫婦旅行 2〜3泊 Mサイズ×1 または Sサイズ×2 荷物をまとめたい人／各自で管理したい人
3人家族 4〜5泊 Lサイズ×1 または Mサイズ×2 子どもが小さい家庭／荷物を分けたい家庭
4人家族・長期旅行 Lサイズ×2 または L＋M/td> 荷物が多い、泊数が長い旅行

一人旅：2〜4泊ならSサイズ1台が基本

For solo travelers, one S-sized suitcase is generally sufficient for trips of 2 to 4 nights.

 

Especially for domestic or short-term international travel, a suitcase of around 40L is usually adequate.

Choosing a cabin-friendly size means you won't have to check your luggage at the airport,

and you can head straight to your destination upon arrival, which is a significant advantage.

However, for winter trips or if you plan to do a lot of shopping at your destination, an S-sized suitcase might feel a bit cramped.

In such cases, it's safer to opt for a slightly larger M-sized model or one with an expansion feature.

夫婦旅行：2〜3泊ならMサイズ1台かSサイズ2台

When traveling as a couple, many people wonder whether to pack all their belongings into one M-sized suitcase or split them into two S-sized suitcases.

 

Consolidating your luggage into one suitcase makes it easier to manage and reduces the number of bags you need to keep track of while moving around.

If you're mainly traveling by car or staying in hotels, one M-sized suitcase should be perfectly convenient.

However, if you'll be traveling frequently by plane or train, splitting your luggage into two S-sized suitcases allows each person to manage their own belongings and distributes the weight.

You can also store clothes and small items separately, making it easier to organize your belongings when you unpack at the hotel.

3人家族：4~5泊ならLサイズ1台かMサイズ2台

For a 4-5 day trip with a family of three, one large suitcase or two medium suitcases are good options.

 

If your child is small and cannot carry their own luggage, it's easier to manage by consolidating everything into one large suitcase for the whole family.

You can store all of your child's necessities, such as diapers, changes of clothes, and towels, together, allowing for unified management of essential items.

On the other hand, if your child is older and their luggage volume has increased, it's convenient to divide items into two medium suitcases.

This allows you to separate parental belongings from children's belongings, or clothes from daily necessities,

making it smoother to retrieve items at your destination.

 

We also have a separate article that explains in detail how to choose a suitcase for a family of three.

If you travel frequently with your family, please refer to it as well.

4人家族・長期旅行：Lサイズ2台またはL＋M

For families of four or long trips of 4 nights or more, we recommend two L-sized suitcases or a combination of one L-sized and one M-sized suitcase.

 

If you pack all your family's clothes, toiletries, children's items, and souvenirs into one suitcase,

the suitcase will become too heavy and difficult to move.

If you are flying, there is also a risk of exceeding the weight limit.

 

Therefore, it is safer to distribute your luggage appropriately.

For example, it will be easier to use if you separate your luggage by purpose, such as packing all clothes in one L-sized suitcase and reserving one M-sized suitcase for shoes, daily necessities, and souvenir space.

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三、スーツケースの数を決めるときの判断ポイント

Once you've gotten a general idea from the travel patterns, make your final decision based on your own travel style.

誰がスーツケースを持つか

If you're traveling only with adults, splitting your belongings into two suitcases can distribute the burden.
On the other hand, if you're carrying a child, pushing a stroller, or have a lot of hand luggage, it's easier to get around if you don't increase the number of suitcases too much.

移動手段は何か

If traveling by car, larger suitcases are less likely to be an issue.
However, if you frequently travel by train or bullet train, it's smoother to consolidate your belongings into as few pieces as possible, considering ticket gates, stairs, and onboard space.

If you're flying, packing too much into one suitcase can sometimes lead to overweight charges. For long trips, it may be safer to divide your belongings into two suitcases.

帰りに荷物が増えるか

When traveling with many souvenirs and purchases, it's important not to pack your suitcase to full capacity on the way there.
Aim to fill it only 70-80% on the outbound journey, assuming your luggage will increase on the way back. It's reassuring to have a suitcase with an expansion feature or a foldable bag.

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四、スーツケースの数を減らすための工夫

If you want to reduce the number of suitcases, clever packing is essential.

  • Use compression bags: This reduces the bulk of clothes and towels.
  • Choose versatile clothes that can be mixed and matched: This makes it easier to create outfits with fewer clothes.
  • Do laundry at your destination: This is especially effective for trips of 4 nights or more.
  • Make use of hotel amenities: This can reduce the need for shampoo and towels.
  • Choose a suitcase with an expansion feature: This allows you to increase capacity only for the return trip, eliminating the need for an extra suitcase.

Especially for family trips and visits home, luggage tends to increase on the way back, so choosing a model with an expansion feature is convenient.

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五、旅行におすすめのNew Tripスーツケース組み合わせ

For family trips or group travel, the usability can vary greatly depending on whether you "pack everything in one suitcase" or "combine multiple sizes."

New Trip offers a lineup to match your travel style, from large-capacity models that can securely store everything in one unit, to set models where you can collect different sizes from the same series.

1台にまとめたい家族旅行なら｜New Trip 0211

For those who want to pack all their family's belongings into as few bags as possible, we recommend the New Trip 0211.

Its large-capacity design makes it easy to store clothes, children's items, and daily necessities all together.

When traveling with family, it's easy to lose track of "whose luggage is where," but consolidating everything into one bag makes it easier to manage.

Additionally, the caster design allows for stable and easy maneuverability even with a heavy load, reducing the burden during travel.

New Trip 0211

1台にまとめたい家族旅行

New Trip 0211 スーツケース

Mサイズ・68L｜100%PC

五輪設計 TSAロック 大容量設計 物掛けフック

¥24,580

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コスパよく複数サイズを揃えたいなら｜New Trip 0201セット

For couples or families traveling together who want to use a combination of S, M, and L sizes, we recommend the multi-size set of New Trip 0201 suitcases.

The 0201 is lightweight and easy to handle, and it also features an expandable function, allowing you to travel compactly on the way there and increase capacity on the way back. With a good balance of price and functionality, this series is also a great choice for those buying multiple suitcase sizes for the first time.

New Trip 0201 組み合わせ

コスパよく複数サイズを揃えたい

New Trip 0201 スーツケース 2点セット

S/M/Lサイズ｜ABS+PC

超軽量 拡張機能 TSAロック 多段階調整キャリーバー

¥29,260

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大容量と走行性を重視するなら｜New Trip 0502セット

For trips where your luggage tends to increase, such as visits back home, family vacations, or shopping trips, the New Trip 0502 size variety set is highly recommended.

The 0502 features an expansion function, making it easy to accommodate more souvenirs or purchases on your way back. Furthermore, it uses quiet casters made by HINOMOTO, allowing for smooth movement even with heavy luggage.

New Trip 0502 組み合わせ

長期旅行・海外渡航におすすめ

New Trip 0502 スーツケース ２点セット

S/M/Lサイズ｜100%PC

HINOMOTO静音キャスター 拡張機能 TSAロック スマホスタンド

¥42,960

商品を見る
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まとめ

The correct number of suitcases isn't just determined by the number of people.

It's important to choose based on your travel conditions, such as "number of nights, season, who will carry it, mode of transportation, and amount of souvenirs."

If you're unsure, use the following guidelines:

  • One suitcase: small children, mainly traveling by car, want easier luggage management
  • Multiple suitcases: frequent train/Shinkansen travel, prefer individual luggage management, lots of souvenirs

At New Trip, we offer everything from large-capacity models that are easy to consolidate for the whole family to economical sets that allow you to have different sizes.

Choose the combination that best suits your travel style and enjoy a comfortable trip.

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よくある質問（FAQ）

Q1. 家族旅行はスーツケース1台で足りますか？

A. 短期旅行や荷物が少ない場合は1台でも対応できます。ただし、4人家族や長期旅行では重くなりやすいため、2台に分けた方が移動しやすくなります。

Q2. 夫婦なら2人で1台でも大丈夫ですか？

A. 2〜3泊程度ならMサイズ1台でも十分です。荷物を分けて管理したい場合や重量を分散したい場合は、Sサイズ2台もおすすめです。

Q3. 子どもの荷物は分けたほうがいいですか？

A. 小さな子どもの荷物は親がまとめて管理するのが便利です。小学生以上なら、小さめのバッグやキャリーを持たせるのもよいでしょう。

Q4. 飛行機ではスーツケースを分けたほうが便利ですか？

A. 長期旅行や海外旅行では、重量オーバーを防ぐために2台へ分ける方が安心です。

Q5. お土産が増えそうな場合はどうすればいいですか？

A. 荷物を7〜8割に抑え、拡張機能付きスーツケースや折りたたみバッグを活用すると安心です。

Q6. 4人家族ならスーツケースは何個必要ですか？

A. 2〜3泊ならLサイズ1台でも対応可能ですが、4泊以上や冬旅行ではLサイズ2台、またはLサイズ＋Mサイズがおすすめです。

執筆・監修

New Trip編集部
本記事は、スーツケース・旅行用品ブランド「New Trip」の編集部により制作されました。
製品開発やユーザーの声を活かしながら、ユーザーに合ったスーツケースや、旅行・出張をより快適にするアイテムを発信しています。

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