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Sioux City

$354+ Cheap flights from Boston to Sioux City (BOS - SUX)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SUX
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Boston to Sioux City

Cheapest flights from Boston to Sioux City
Explore the most affordable flight options available from Boston to Sioux City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/179:10 amBOS - SUX
2 stops10h 00mUnited Airlines
Wed 12/247:50 amSUX - BOS
1 stop5h 54mUnited Airlines
Deal found 12/16$434
This United Airlines deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:23 pmBOS - SUX
1 stop5h 52mUnited Airlines
Sat 1/37:50 amSUX - BOS
1 stop28h 03mUnited Airlines
Deal found 12/14$573
This United Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/214:15 pmBOS - SUX
1 stop8h 00mUnited Airlines
Sun 12/286:54 pmSUX - BOS
1 stop27h 41mUnited Airlines
Deal found 12/16$730

Find flight deals from Boston to Sioux City

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Sioux City (SUX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$354
(United Airlines)

Popular in

May

Cheapest in

November

Average price

$461
Provider with most accurate pricing for Boston Logan Intl-Sioux City Sioux Gateway flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Sioux City Sioux Gateway flights.
Search Deals
From Boston Logan Intl to Sioux City Sioux Gateway
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($100 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Sioux City that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Boston to Sioux City that are best for you.

Fly from

Boston

Fly to

Sioux City

Route

Depart

Return

Price

BostonSioux City

BOS - SUX

BOSSUX

Boston Logan Intl

Thu 1/22

4:49 pm-11:47 pm

1 stop7h 58m

Sioux City Sioux Gateway

Mon 1/26

6:00 am-2:02 pm

1 stop7h 02m

$354

BostonSioux City

BOS - SUX

BOSSUX

Boston Logan Intl

Tue 12/30

6:23 pm-11:15 pm

1 stop5h 52m

Sioux City Sioux Gateway

Sat 1/3

7:50 am-12:53 pm

1 stop28h 03m

$573

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Compare providers for flights from Boston to Sioux City

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Sioux City in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-Sioux City flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Boston-Sioux City flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Boston-Sioux City flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Sioux City flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Sioux City flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to Sioux City

Have a flexible travel schedule? Discover the best time to fly to Sioux City from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to Sioux City

What is the cheapest month to book a flight from Boston to Sioux City?

Currently, September is the cheapest month in which you can book a flight from Boston to Sioux City (average of $238). Flying from Boston to Sioux City in December is currently the most expensive (average of $307). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Sioux City

Get insights into the airlines that provide service to Sioux City. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sioux City. Reviews last updated December 18, 2025.
Get a feel of what it's like to fly with United Airlines from Boston to Sioux City by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,091 reviews

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
United Airlines
7.4
Good
9,091 reviews
United Airlines
7.4
Good
9,091 reviews

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability

Related info for your journey

Find useful and relevant information for your journey from Boston to Sioux City. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Boston to Sioux City?

    There are many flights that can get you from Boston to Sioux City in 7h 58m. Fly via United Airlines to get the fastest option. Airlines will cover a distance of 1289 mi.

  • What is the cheapest airline to fly from Boston to Sioux City round-trip?

    Cheapflights users have booked flights from Boston to Sioux City round-trip from $253. This flight start at 53% lower than the current average price 3 months from now.

  • Can I find deals for flights from Boston to Sioux City that include hotel bookings?

    Yes. In addition to deals on Boston to Sioux City flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Sioux City?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Sioux City.

  • Can I find deals for business class flights from Boston to Sioux City?

    Yes. Cheapflights offers flight deals from Boston to Sioux City by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to Sioux City?

    Currently, September is the cheapest month in which you can book a flight from Boston to Sioux City (average of $238). Flying from Boston to Sioux City in December is currently the most expensive (average of $307). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Boston to Sioux City

Discover the top airline that operate flights from Boston to Sioux City. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$253Average$551FlexibilityNo cancel feeOn-time69%

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